20351010240 has 560 divisors, whose sum is σ = 79702359264. Its totient is φ = 4888166400.

The previous prime is 20351010193. The next prime is 20351010271. The reversal of 20351010240 is 4201015302.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 39061180 + ... + 39061700.

Almost surely, 2^20351010240 is an apocalyptic number.

20351010240 is a gapful number since it is divisible by the number (20) 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 20351010240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39851179632).

20351010240 is an abundant number, since it is smaller than the sum of its proper divisors (59351349024).

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

20351010240 is a wasteful number, since it uses less digits than its factorization.

20351010240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698 (or 679 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

Adding to 20351010240 its reverse (4201015302), we get a palindrome (24552025542).

The spelling of 20351010240 in words is "twenty billion, three hundred fifty-one million, ten thousand, two hundred forty".