20720374 has 16 divisors (see below), whose sum is σ = 32845680. Its totient is φ = 9776160.

The previous prime is 20720363. The next prime is 20720417. The reversal of 20720374 is 47302702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10204 + ... + 12064.

It is an arithmetic number, because the mean of its divisors is an integer number (2052855).

Almost surely, 2^20720374 is an apocalyptic number.

20720374 is a deficient number, since it is larger than the sum of its proper divisors (12125306).

20720374 is a wasteful number, since it uses less digits than its factorization.

20720374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2175.

The product of its (nonzero) digits is 2352, while the sum is 25.

The square root of 20720374 is about 4551.9637520525. The cubic root of 20720374 is about 274.6623912076.

The spelling of 20720374 in words is "twenty million, seven hundred twenty thousand, three hundred seventy-four".