20731374 has 48 divisors (see below), whose sum is σ = 47309184. Its totient is φ = 6552000.

The previous prime is 20731351. The next prime is 20731391. The reversal of 20731374 is 47313702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29224 + ... + 29924.

It is an arithmetic number, because the mean of its divisors is an integer number (985608).

Almost surely, 2^20731374 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20731374, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23654592).

20731374 is an abundant number, since it is smaller than the sum of its proper divisors (26577810).

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

20731374 is a wasteful number, since it uses less digits than its factorization.

20731374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793 (or 790 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 27.

The square root of 20731374 is about 4553.1718614610. The cubic root of 20731374 is about 274.7109867239.

The spelling of 20731374 in words is "twenty million, seven hundred thirty-one thousand, three hundred seventy-four".