21455161300 has 36 divisors (see below), whose sum is σ = 48581953056. Its totient is φ = 8208930400.

The previous prime is 21455161291. The next prime is 21455161309. The reversal of 21455161300 is 316155412.

It is an interprime number because it is at equal distance from previous prime (21455161291) and next prime (21455161309).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21455161309) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4661866 + ... + 4666465.

It is an arithmetic number, because the mean of its divisors is an integer number (1349498696).

Almost surely, 2^21455161300 is an apocalyptic number.

21455161300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21455161300 is an abundant number, since it is smaller than the sum of its proper divisors (27126791756).

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

21455161300 is a wasteful number, since it uses less digits than its factorization.

21455161300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9328368 (or 9328361 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The spelling of 21455161300 in words is "twenty-one billion, four hundred fifty-five million, one hundred sixty-one thousand, three hundred".