20046656651 has 4 divisors (see below), whose sum is σ = 22910464752. Its totient is φ = 17182848552.

The previous prime is 20046656639. The next prime is 20046656681. The reversal of 20046656651 is 15665664002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20046656651 - 2²⁶ = 19979547787 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20046656599 and 20046656608.

It is not an unprimeable number, because it can be changed into a prime (20046656621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1431904040 + ... + 1431904053.

It is an arithmetic number, because the mean of its divisors is an integer number (5727616188).

Almost surely, 2^20046656651 is an apocalyptic number.

20046656651 is a deficient number, since it is larger than the sum of its proper divisors (2863808101).

20046656651 is an equidigital number, since it uses as much as digits as its factorization.

20046656651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2863808100.

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 20046656651 in words is "twenty billion, forty-six million, six hundred fifty-six thousand, six hundred fifty-one".