21546741400 has 48 divisors (see below), whose sum is σ = 50106380040. Its totient is φ = 8616940800.

The previous prime is 21546741379. The next prime is 21546741421. The reversal of 21546741400 is 414764512.

It is an interprime number because it is at equal distance from previous prime (21546741379) and next prime (21546741421).

It is a congruent number.

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, 1474932 + ... + 1489468.

Almost surely, 2^21546741400 is an apocalyptic number.

21546741400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21546741400 is an abundant number, since it is smaller than the sum of its proper divisors (28559638640).

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

21546741400 is a wasteful number, since it uses less digits than its factorization.

21546741400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21964 (or 21955 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 34.

The spelling of 21546741400 in words is "twenty-one billion, five hundred forty-six million, seven hundred forty-one thousand, four hundred".