20541380400 has 90 divisors (see below), whose sum is σ = 71284308420. Its totient is φ = 5477700480.

The previous prime is 20541380399. The next prime is 20541380467. The reversal of 20541380400 is 408314502.

20541380400 is a `hidden beast` number, since 2 + 0 + 541 + 3 + 80 + 40 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (90).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2849370 + ... + 2856569.

Almost surely, 2^20541380400 is an apocalyptic number.

20541380400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20541380400 is an abundant number, since it is smaller than the sum of its proper divisors (50742928020).

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

20541380400 is a wasteful number, since it uses less digits than its factorization.

20541380400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5705963 (or 5705949 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 20541380400 its reverse (408314502), we get a palindrome (20949694902).

The spelling of 20541380400 in words is "twenty billion, five hundred forty-one million, three hundred eighty thousand, four hundred".