21934197152 has 48 divisors (see below), whose sum is σ = 49397729472. Its totient is φ = 9391649280.

The previous prime is 21934197149. The next prime is 21934197161. The reversal of 21934197152 is 25179143912.

It is a super-2 number, since 2×21934197152² (a number of 21 digits) contains 22 as substring.

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, 199508 + ... + 289260.

It is an arithmetic number, because the mean of its divisors is an integer number (1029119364).

Almost surely, 2^21934197152 is an apocalyptic number.

It is an amenable number.

21934197152 is an abundant number, since it is smaller than the sum of its proper divisors (27463532320).

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

21934197152 is a wasteful number, since it uses less digits than its factorization.

21934197152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90861 (or 90853 counting only the distinct ones).

The product of its digits is 136080, while the sum is 44.

The spelling of 21934197152 in words is "twenty-one billion, nine hundred thirty-four million, one hundred ninety-seven thousand, one hundred fifty-two".