20980971742 has 8 divisors (see below), whose sum is σ = 31555832616. Its totient is φ = 10462360872.

The previous prime is 20980971731. The next prime is 20980971763. The reversal of 20980971742 is 24717908902.

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

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, 14061568 + ... + 14063059.

It is an arithmetic number, because the mean of its divisors is an integer number (3944479077).

Almost surely, 2^20980971742 is an apocalyptic number.

20980971742 is a deficient number, since it is larger than the sum of its proper divisors (10574860874).

20980971742 is a wasteful number, since it uses less digits than its factorization.

20980971742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28125002.

The product of its (nonzero) digits is 508032, while the sum is 49.

The spelling of 20980971742 in words is "twenty billion, nine hundred eighty million, nine hundred seventy-one thousand, seven hundred forty-two".