10621980 has 36 divisors (see below), whose sum is σ = 32220552. Its totient is φ = 2832480.

The previous prime is 10621973. The next prime is 10621981. The reversal of 10621980 is 8912601.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×10621980² = 225652918240800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10621981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29326 + ... + 29685.

Almost surely, 2^10621980 is an apocalyptic number.

10621980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10621980 is an abundant number, since it is smaller than the sum of its proper divisors (21598572).

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

10621980 is a wasteful number, since it uses less digits than its factorization.

10621980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59026 (or 59021 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 10621980 is about 3259.1379228256. The cubic root of 10621980 is about 219.8206527312.

The spelling of 10621980 in words is "ten million, six hundred twenty-one thousand, nine hundred eighty".