20164633446 has 16 divisors (see below), whose sum is σ = 41090197104. Its totient is φ = 6594722784.

The previous prime is 20164633399. The next prime is 20164633459. The reversal of 20164633446 is 64433646102.

It is a super-2 number, since 2×20164633446² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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, 31705081 + ... + 31705716.

It is an arithmetic number, because the mean of its divisors is an integer number (2568137319).

Almost surely, 2^20164633446 is an apocalyptic number.

20164633446 is an abundant number, since it is smaller than the sum of its proper divisors (20925563658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20164633446 is a wasteful number, since it uses less digits than its factorization.

20164633446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63410855.

The product of its (nonzero) digits is 248832, while the sum is 39.

The spelling of 20164633446 in words is "twenty billion, one hundred sixty-four million, six hundred thirty-three thousand, four hundred forty-six".