21620614037610 has 192 divisors, whose sum is σ = 62724458115072. Its totient is φ = 4669923939072.

The previous prime is 21620614037587. The next prime is 21620614037681. The reversal of 21620614037610 is 1673041602612.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6998329 + ... + 9603011.

It is an arithmetic number, because the mean of its divisors is an integer number (326689886016).

Almost surely, 2^{21620614037610} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21620614037610, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31362229057536).

21620614037610 is an abundant number, since it is smaller than the sum of its proper divisors (41103844077462).

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

21620614037610 is a wasteful number, since it uses less digits than its factorization.

21620614037610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2604805 (or 2604776 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 39.

The spelling of 21620614037610 in words is "twenty-one trillion, six hundred twenty billion, six hundred fourteen million, thirty-seven thousand, six hundred ten".