20139294 has 24 divisors (see below), whose sum is σ = 46855368. Its totient is φ = 5754000.

The previous prime is 20139277. The next prime is 20139307. The reversal of 20139294 is 49293102.

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 11 ways as a sum of consecutive naturals, for example, 33957 + ... + 34544.

It is an arithmetic number, because the mean of its divisors is an integer number (1952307).

Almost surely, 2^20139294 is an apocalyptic number.

20139294 is an abundant number, since it is smaller than the sum of its proper divisors (26716074).

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

20139294 is a wasteful number, since it uses less digits than its factorization.

20139294 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68520 (or 68513 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 20139294 is about 4487.6824753986. The cubic root of 20139294 is about 272.0704744578.

The spelling of 20139294 in words is "twenty million, one hundred thirty-nine thousand, two hundred ninety-four".