21839741992 has 16 divisors (see below), whose sum is σ = 40953144960. Its totient is φ = 10918903344.

The previous prime is 21839741927. The next prime is 21839741993. The reversal of 21839741992 is 29914793812.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21839741993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20088 + ... + 209959.

It is an arithmetic number, because the mean of its divisors is an integer number (2559571560).

Almost surely, 2^21839741992 is an apocalyptic number.

It is an amenable number.

21839741992 is a deficient number, since it is larger than the sum of its proper divisors (19113402968).

21839741992 is a wasteful number, since it uses less digits than its factorization.

21839741992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241920 (or 241916 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 55.

The spelling of 21839741992 in words is "twenty-one billion, eight hundred thirty-nine million, seven hundred forty-one thousand, nine hundred ninety-two".