1051618420 has 96 divisors (see below), whose sum is σ = 2378170368. Its totient is φ = 389676672.

The previous prime is 1051618411. The next prime is 1051618423. The reversal of 1051618420 is 248161501.

It is a super-2 number, since 2×1051618420² = 2211802602566592800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1051618423) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2745549 + ... + 2745931.

It is an arithmetic number, because the mean of its divisors is an integer number (24772608).

Almost surely, 2^1051618420 is an apocalyptic number.

1051618420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1051618420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1189085184).

1051618420 is an abundant number, since it is smaller than the sum of its proper divisors (1326551948).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1051618420 is a wasteful number, since it uses less digits than its factorization.

1051618420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589 (or 587 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 1051618420 is about 32428.6666392561. Note that the first 4 decimals coincide. The cubic root of 1051618420 is about 1016.9182970569.

Adding to 1051618420 its reverse (248161501), we get a palindrome (1299779921).

The spelling of 1051618420 in words is "one billion, fifty-one million, six hundred eighteen thousand, four hundred twenty".