20979229342 has 32 divisors (see below), whose sum is σ = 32619036960. Its totient is φ = 10115212800.

The previous prime is 20979229303. The next prime is 20979229351. The reversal of 20979229342 is 24392297902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1195818 + ... + 1213234.

It is an arithmetic number, because the mean of its divisors is an integer number (1019344905).

Almost surely, 2^20979229342 is an apocalyptic number.

20979229342 is a deficient number, since it is larger than the sum of its proper divisors (11639807618).

20979229342 is a wasteful number, since it uses less digits than its factorization.

20979229342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17676.

The product of its (nonzero) digits is 979776, while the sum is 49.

The spelling of 20979229342 in words is "twenty billion, nine hundred seventy-nine million, two hundred twenty-nine thousand, three hundred forty-two".