20431692 has 36 divisors (see below), whose sum is σ = 52188136. Its totient is φ = 6739200.

The previous prime is 20431687. The next prime is 20431721. The reversal of 20431692 is 29613402.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 567 + ... + 6417.

Almost surely, 2^20431692 is an apocalyptic number.

It is an amenable number.

20431692 is an abundant number, since it is smaller than the sum of its proper divisors (31756444).

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

20431692 is a wasteful number, since it uses less digits than its factorization.

20431692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5958 (or 5953 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 20431692 is about 4520.1429180945. The cubic root of 20431692 is about 273.3808635700.

The spelling of 20431692 in words is "twenty million, four hundred thirty-one thousand, six hundred ninety-two".