21620604357060 has 48 divisors (see below), whose sum is σ = 60540162518976. Its totient is φ = 5765259226752.

The previous prime is 21620604357019. The next prime is 21620604357097. The reversal of 21620604357060 is 6075340602612.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5867047 + ... + 8812686.

It is an arithmetic number, because the mean of its divisors is an integer number (1261253385812).

Almost surely, 2^{21620604357060} is an apocalyptic number.

21620604357060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21620604357060 is an abundant number, since it is smaller than the sum of its proper divisors (38919558161916).

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

21620604357060 is a wasteful number, since it uses less digits than its factorization.

21620604357060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14704292 (or 14704290 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 42.

Adding to 21620604357060 its reverse (6075340602612), we get a palindrome (27695944959672).

The spelling of 21620604357060 in words is "twenty-one trillion, six hundred twenty billion, six hundred four million, three hundred fifty-seven thousand, sixty".