20621203460 has 96 divisors (see below), whose sum is σ = 50913442944. Its totient is φ = 6916608000.

The previous prime is 20621203429. The next prime is 20621203469. The reversal of 20621203460 is 6430212602.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (20621203469) 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, 6779540 + ... + 6782580.

It is an arithmetic number, because the mean of its divisors is an integer number (530348364).

Almost surely, 2^20621203460 is an apocalyptic number.

20621203460 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 20621203460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25456721472).

20621203460 is an abundant number, since it is smaller than the sum of its proper divisors (30292239484).

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

20621203460 is a wasteful number, since it uses less digits than its factorization.

20621203460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5445 (or 5443 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The spelling of 20621203460 in words is "twenty billion, six hundred twenty-one million, two hundred three thousand, four hundred sixty".