20941900 has 36 divisors (see below), whose sum is σ = 51937648. Its totient is φ = 7179840.

The previous prime is 20941871. The next prime is 20941913. The reversal of 20941900 is 914902.

It is a super-2 number, since 2×20941900² = 877126351220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14259 + ... + 15658.

Almost surely, 2^20941900 is an apocalyptic number.

20941900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20941900 is an abundant number, since it is smaller than the sum of its proper divisors (30995748).

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

20941900 is a wasteful number, since it uses less digits than its factorization.

20941900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29938 (or 29931 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 20941900 is about 4576.2320745347. The cubic root of 20941900 is about 275.6377485135.

The spelling of 20941900 in words is "twenty million, nine hundred forty-one thousand, nine hundred".