20950647457694 has 16 divisors (see below), whose sum is σ = 31448786077440. Its totient is φ = 10467719312160.

The previous prime is 20950647457679. The next prime is 20950647457697. The reversal of 20950647457694 is 49675474605902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20950647457697) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86358524 + ... + 86600784.

It is an arithmetic number, because the mean of its divisors is an integer number (1965549129840).

Almost surely, 2^{20950647457694} is an apocalyptic number.

20950647457694 is a deficient number, since it is larger than the sum of its proper divisors (10498138619746).

20950647457694 is a wasteful number, since it uses less digits than its factorization.

20950647457694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273475.

The product of its (nonzero) digits is 457228800, while the sum is 68.

The spelling of 20950647457694 in words is "twenty trillion, nine hundred fifty billion, six hundred forty-seven million, four hundred fifty-seven thousand, six hundred ninety-four".