20139462 has 32 divisors (see below), whose sum is σ = 51148800. Its totient is φ = 5754024.

The previous prime is 20139443. The next prime is 20139479. The reversal of 20139462 is 26493102.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 26262 + ... + 27017.

It is an arithmetic number, because the mean of its divisors is an integer number (1598400).

Almost surely, 2^20139462 is an apocalyptic number.

20139462 is an abundant number, since it is smaller than the sum of its proper divisors (31009338).

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

20139462 is a wasteful number, since it uses less digits than its factorization.

20139462 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53297 (or 53291 counting only the distinct ones).

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

The square root of 20139462 is about 4487.7011932614. The cubic root of 20139462 is about 272.0712309841.

The spelling of 20139462 in words is "twenty million, one hundred thirty-nine thousand, four hundred sixty-two".