21392198332 has 24 divisors (see below), whose sum is σ = 38461860864. Its totient is φ = 10405821552.

The previous prime is 21392198329. The next prime is 21392198339. The reversal of 21392198332 is 23389129312.

It is a super-2 number, since 2×21392198332² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21392198339) 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, 309288 + ... + 372079.

It is an arithmetic number, because the mean of its divisors is an integer number (1602577536).

Almost surely, 2^21392198332 is an apocalyptic number.

It is an amenable number.

21392198332 is a deficient number, since it is larger than the sum of its proper divisors (17069662532).

21392198332 is a wasteful number, since it uses less digits than its factorization.

21392198332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681585 (or 681583 counting only the distinct ones).

The product of its digits is 139968, while the sum is 43.

The spelling of 21392198332 in words is "twenty-one billion, three hundred ninety-two million, one hundred ninety-eight thousand, three hundred thirty-two".