20046656665 has 32 divisors (see below), whose sum is σ = 28047534336. Its totient is φ = 13469464320.

The previous prime is 20046656639. The next prime is 20046656681. The reversal of 20046656665 is 56665664002.

It is not a de Polignac number, because 20046656665 - 2⁷ = 20046656537 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1516374 + ... + 1529536.

It is an arithmetic number, because the mean of its divisors is an integer number (876485448).

Almost surely, 2^20046656665 is an apocalyptic number.

It is an amenable number.

20046656665 is a deficient number, since it is larger than the sum of its proper divisors (8000877671).

20046656665 is a wasteful number, since it uses less digits than its factorization.

20046656665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14049.

The product of its (nonzero) digits is 1555200, while the sum is 46.

The spelling of 20046656665 in words is "twenty billion, forty-six million, six hundred fifty-six thousand, six hundred sixty-five".