20541900 has 36 divisors (see below), whose sum is σ = 59435432. Its totient is φ = 5477760.

The previous prime is 20541893. The next prime is 20541901. The reversal of 20541900 is 914502.

It is a super-2 number, since 2×20541900² = 843939311220000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20541901) by changing a digit.

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, 33937 + ... + 34536.

Almost surely, 2^20541900 is an apocalyptic number.

20541900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20541900 is an abundant number, since it is smaller than the sum of its proper divisors (38893532).

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

20541900 is a wasteful number, since it uses less digits than its factorization.

20541900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68490 (or 68483 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 20541900 is about 4532.3172880989. The cubic root of 20541900 is about 273.8715187855.

The spelling of 20541900 in words is "twenty million, five hundred forty-one thousand, nine hundred".