20921962 has 16 divisors (see below), whose sum is σ = 33011712. Its totient is φ = 9930960.

The previous prime is 20921959. The next prime is 20921981. The reversal of 20921962 is 26912902.

It is a Harshad number since it is a multiple of its sum of digits (31).

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, 103 + ... + 6469.

It is an arithmetic number, because the mean of its divisors is an integer number (2063232).

Almost surely, 2^20921962 is an apocalyptic number.

20921962 is a deficient number, since it is larger than the sum of its proper divisors (12089750).

20921962 is a wasteful number, since it uses less digits than its factorization.

20921962 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6453.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 20921962 is about 4574.0531260579. The cubic root of 20921962 is about 275.5502459401.

The spelling of 20921962 in words is "twenty million, nine hundred twenty-one thousand, nine hundred sixty-two".