20631934 has 8 divisors (see below), whose sum is σ = 32015160. Its totient is φ = 9960216.

The previous prime is 20631911. The next prime is 20631937. The reversal of 20631934 is 43913602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20631937) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 177804 + ... + 177919.

It is an arithmetic number, because the mean of its divisors is an integer number (4001895).

Almost surely, 2^20631934 is an apocalyptic number.

20631934 is a deficient number, since it is larger than the sum of its proper divisors (11383226).

20631934 is a wasteful number, since it uses less digits than its factorization.

20631934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355754.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 20631934 is about 4542.2388752685. The cubic root of 20631934 is about 274.2710568236.

The spelling of 20631934 in words is "twenty million, six hundred thirty-one thousand, nine hundred thirty-four".