20860920 has 48 divisors (see below), whose sum is σ = 67799160. Its totient is φ = 5562816.

The previous prime is 20860913. The next prime is 20860943. The reversal of 20860920 is 2906802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28614 + ... + 29333.

Almost surely, 2^20860920 is an apocalyptic number.

20860920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20860920 is an abundant number, since it is smaller than the sum of its proper divisors (46938240).

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

20860920 is a wasteful number, since it uses less digits than its factorization.

20860920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57964 (or 57957 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 20860920 is about 4567.3756140699. The cubic root of 20860920 is about 275.2820027284.

The spelling of 20860920 in words is "twenty million, eight hundred sixty thousand, nine hundred twenty".