21392929342 has 8 divisors (see below), whose sum is σ = 32099125032. Its totient is φ = 10693221000.

The previous prime is 21392929309. The next prime is 21392929399. The reversal of 21392929342 is 24392929312.

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

It is a junction number, because it is equal to n+sod(n) for n = 21392929292 and 21392929301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1613584 + ... + 1626787.

It is an arithmetic number, because the mean of its divisors is an integer number (4012390629).

Almost surely, 2^21392929342 is an apocalyptic number.

21392929342 is a deficient number, since it is larger than the sum of its proper divisors (10706195690).

21392929342 is a wasteful number, since it uses less digits than its factorization.

21392929342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3243674.

The product of its digits is 419904, while the sum is 46.

The spelling of 21392929342 in words is "twenty-one billion, three hundred ninety-two million, nine hundred twenty-nine thousand, three hundred forty-two".