20657313950 has 192 divisors, whose sum is σ = 50945072640. Its totient is φ = 6048483840.

The previous prime is 20657313949. The next prime is 20657313979. The reversal of 20657313950 is 5931375602.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20657313898 and 20657313907.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3714572 + ... + 3720128.

It is an arithmetic number, because the mean of its divisors is an integer number (265338920).

Almost surely, 2^20657313950 is an apocalyptic number.

20657313950 is an abundant number, since it is smaller than the sum of its proper divisors (30287758690).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20657313950 is a wasteful number, since it uses less digits than its factorization.

20657313950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5651 (or 5646 counting only the distinct ones).

The product of its (nonzero) digits is 170100, while the sum is 41.

The spelling of 20657313950 in words is "twenty billion, six hundred fifty-seven million, three hundred thirteen thousand, nine hundred fifty".