21369004737 has 8 divisors (see below), whose sum is σ = 28496685600. Its totient is φ = 14243663520.

The previous prime is 21369004681. The next prime is 21369004747. The reversal of 21369004737 is 73740096312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21369004737 - 2³¹ = 19221521089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21369004747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 563487 + ... + 600212.

It is an arithmetic number, because the mean of its divisors is an integer number (3562085700).

Almost surely, 2^21369004737 is an apocalyptic number.

It is an amenable number.

21369004737 is a deficient number, since it is larger than the sum of its proper divisors (7127680863).

21369004737 is a wasteful number, since it uses less digits than its factorization.

21369004737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1169823.

The product of its (nonzero) digits is 190512, while the sum is 42.

The spelling of 21369004737 in words is "twenty-one billion, three hundred sixty-nine million, four thousand, seven hundred thirty-seven".