21534662300 has 72 divisors (see below), whose sum is σ = 49109679696. Its totient is φ = 8186088960.

The previous prime is 21534662291. The next prime is 21534662309. The reversal of 21534662300 is 326643512.

It is an interprime number because it is at equal distance from previous prime (21534662291) and next prime (21534662309).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21534662309) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 91424 + ... + 226776.

Almost surely, 2^21534662300 is an apocalyptic number.

21534662300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21534662300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24554839848).

21534662300 is an abundant number, since it is smaller than the sum of its proper divisors (27575017396).

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

21534662300 is a wasteful number, since it uses less digits than its factorization.

21534662300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135447 (or 135440 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

The spelling of 21534662300 in words is "twenty-one billion, five hundred thirty-four million, six hundred sixty-two thousand, three hundred".