20146042464 has 24 divisors (see below), whose sum is σ = 52883361720. Its totient is φ = 6715347456.

The previous prime is 20146042459. The next prime is 20146042471. The reversal of 20146042464 is 46424064102.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×20146042464² (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 3 ways as a sum of consecutive naturals, for example, 104927209 + ... + 104927400.

It is an arithmetic number, because the mean of its divisors is an integer number (2203473405).

Almost surely, 2^20146042464 is an apocalyptic number.

20146042464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20146042464 is an abundant number, since it is smaller than the sum of its proper divisors (32737319256).

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

20146042464 is a wasteful number, since it uses less digits than its factorization.

20146042464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209854622 (or 209854614 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 33.

The spelling of 20146042464 in words is "twenty billion, one hundred forty-six million, forty-two thousand, four hundred sixty-four".