20657454610 has 16 divisors (see below), whose sum is σ = 40043681496. Its totient is φ = 7627367808.

The previous prime is 20657454563. The next prime is 20657454641. The reversal of 20657454610 is 1645475602.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 9936301761 + 10721152849 = 99681^2 + 103543^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79451619 + ... + 79451878.

Almost surely, 2^20657454610 is an apocalyptic number.

20657454610 is a deficient number, since it is larger than the sum of its proper divisors (19386226886).

20657454610 is a wasteful number, since it uses less digits than its factorization.

20657454610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158903517.

The product of its (nonzero) digits is 201600, while the sum is 40.

The spelling of 20657454610 in words is "twenty billion, six hundred fifty-seven million, four hundred fifty-four thousand, six hundred ten".