20356646151 has 32 divisors (see below), whose sum is σ = 29000160000. Its totient is φ = 12664505088.

The previous prime is 20356646117. The next prime is 20356646173. The reversal of 20356646151 is 15164665302.

It is not a de Polignac number, because 20356646151 - 2²¹ = 20354548999 is a prime.

It is a super-2 number, since 2×20356646151² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20356646111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1644955 + ... + 1657283.

It is an arithmetic number, because the mean of its divisors is an integer number (906255000).

Almost surely, 2^20356646151 is an apocalyptic number.

20356646151 is a deficient number, since it is larger than the sum of its proper divisors (8643513849).

20356646151 is a wasteful number, since it uses less digits than its factorization.

20356646151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12783.

The product of its (nonzero) digits is 129600, while the sum is 39.

The spelling of 20356646151 in words is "twenty billion, three hundred fifty-six million, six hundred forty-six thousand, one hundred fifty-one".