21300532042 has 4 divisors (see below), whose sum is σ = 31950798066. Its totient is φ = 10650266020.

The previous prime is 21300532037. The next prime is 21300532081. The reversal of 21300532042 is 24023500312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 20382987361 + 917544681 = 142769^2 + 30291^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5325133009 + ... + 5325133012.

Almost surely, 2^21300532042 is an apocalyptic number.

21300532042 is a deficient number, since it is larger than the sum of its proper divisors (10650266024).

21300532042 is a wasteful number, since it uses less digits than its factorization.

21300532042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10650266023.

The product of its (nonzero) digits is 1440, while the sum is 22.

The spelling of 21300532042 in words is "twenty-one billion, three hundred million, five hundred thirty-two thousand, forty-two".