20457932 has 12 divisors (see below), whose sum is σ = 39056136. Its totient is φ = 9299040.

The previous prime is 20457917. The next prime is 20457937. The reversal of 20457932 is 23975402.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20457937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 232433 + ... + 232520.

It is an arithmetic number, because the mean of its divisors is an integer number (3254678).

Almost surely, 2^20457932 is an apocalyptic number.

20457932 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20457932 is a deficient number, since it is larger than the sum of its proper divisors (18598204).

20457932 is a wasteful number, since it uses less digits than its factorization.

20457932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464968 (or 464966 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 20457932 is about 4523.0445498580. The cubic root of 20457932 is about 273.4978459703.

The spelling of 20457932 in words is "twenty million, four hundred fifty-seven thousand, nine hundred thirty-two".