20551402610 has 16 divisors (see below), whose sum is σ = 37373892696. Its totient is φ = 8135812608.

The previous prime is 20551402577. The next prime is 20551402637. The reversal of 20551402610 is 1620415502.

It can be written as a sum of positive squares in 4 ways, for example, as 14571628369 + 5979774241 = 120713^2 + 77329^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20551402610.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10592537 + ... + 10594476.

Almost surely, 2^20551402610 is an apocalyptic number.

20551402610 is a deficient number, since it is larger than the sum of its proper divisors (16822490086).

20551402610 is a wasteful number, since it uses less digits than its factorization.

20551402610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21187117.

The product of its (nonzero) digits is 2400, while the sum is 26.

The spelling of 20551402610 in words is "twenty billion, five hundred fifty-one million, four hundred two thousand, six hundred ten".