21305674050 has 48 divisors (see below), whose sum is σ = 53835036480. Its totient is φ = 5574312640.

The previous prime is 21305674037. The next prime is 21305674057. The reversal of 21305674050 is 5047650312.

It is not an unprimeable number, because it can be changed into a prime (21305674057) 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, 1332030 + ... + 1347929.

It is an arithmetic number, because the mean of its divisors is an integer number (1121563260).

Almost surely, 2^21305674050 is an apocalyptic number.

21305674050 is an abundant number, since it is smaller than the sum of its proper divisors (32529362430).

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

21305674050 is a wasteful number, since it uses less digits than its factorization.

21305674050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2680027 (or 2680022 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 33.

The spelling of 21305674050 in words is "twenty-one billion, three hundred five million, six hundred seventy-four thousand, fifty".