20906760 has 64 divisors (see below), whose sum is σ = 71683200. Its totient is φ = 4778496.

The previous prime is 20906759. The next prime is 20906771. The reversal of 20906760 is 6760902.

It is a super-2 number, since 2×20906760² = 874185227395200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11605 + ... + 13284.

It is an arithmetic number, because the mean of its divisors is an integer number (1120050).

Almost surely, 2^20906760 is an apocalyptic number.

20906760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20906760 is an abundant number, since it is smaller than the sum of its proper divisors (50776440).

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

20906760 is a wasteful number, since it uses less digits than its factorization.

20906760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24910 (or 24906 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 20906760 is about 4572.3910593911. The cubic root of 20906760 is about 275.4834910502.

The spelling of 20906760 in words is "twenty million, nine hundred six thousand, seven hundred sixty".