21300561340 has 24 divisors (see below), whose sum is σ = 44737187040. Its totient is φ = 8519080128.

The previous prime is 21300561329. The next prime is 21300561371. The reversal of 21300561340 is 4316500312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89994 + ... + 225166.

It is an arithmetic number, because the mean of its divisors is an integer number (1864049460).

Almost surely, 2^21300561340 is an apocalyptic number.

21300561340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21300561340 is an abundant number, since it is smaller than the sum of its proper divisors (23436625700).

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

21300561340 is a wasteful number, since it uses less digits than its factorization.

21300561340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143061 (or 143059 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The spelling of 21300561340 in words is "twenty-one billion, three hundred million, five hundred sixty-one thousand, three hundred forty".