20980640348 has 24 divisors (see below), whose sum is σ = 37158105600. Its totient is φ = 10364226048.

The previous prime is 20980640297. The next prime is 20980640363. The reversal of 20980640348 is 84304608902.

It is a super-2 number, since 2×20980640348² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20980640299 and 20980640308.

It is a congruent number.

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, 439013 + ... + 484451.

It is an arithmetic number, because the mean of its divisors is an integer number (1548254400).

Almost surely, 2^20980640348 is an apocalyptic number.

It is an amenable number.

20980640348 is a deficient number, since it is larger than the sum of its proper divisors (16177465252).

20980640348 is a wasteful number, since it uses less digits than its factorization.

20980640348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46829 (or 46827 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 44.

The spelling of 20980640348 in words is "twenty billion, nine hundred eighty million, six hundred forty thousand, three hundred forty-eight".