19953940202957 has 16 divisors (see below), whose sum is σ = 22073497680960. Its totient is φ = 17965081072512.

The previous prime is 19953940202897. The next prime is 19953940202971. The reversal of 19953940202957 is 75920204935991.

It is a cyclic number.

It is not a de Polignac number, because 19953940202957 - 2⁸ = 19953940202701 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19953940202893 and 19953940202902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19953940202557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 330016088 + ... + 330076545.

It is an arithmetic number, because the mean of its divisors is an integer number (1379593605060).

Almost surely, 2^{19953940202957} is an apocalyptic number.

It is an amenable number.

19953940202957 is a deficient number, since it is larger than the sum of its proper divisors (2119557478003).

19953940202957 is a wasteful number, since it uses less digits than its factorization.

19953940202957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660092732.

The product of its (nonzero) digits is 55112400, while the sum is 65.

The spelling of 19953940202957 in words is "nineteen trillion, nine hundred fifty-three billion, nine hundred forty million, two hundred two thousand, nine hundred fifty-seven".