19970885157 has 8 divisors (see below), whose sum is σ = 26629152480. Its totient is φ = 13313270640.

The previous prime is 19970885149. The next prime is 19970885159. The reversal of 19970885157 is 75158807991.

It is a happy number.

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

It is not a de Polignac number, because 19970885157 - 2³ = 19970885149 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19970885157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19970885159) 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, 86694 + ... + 217847.

It is an arithmetic number, because the mean of its divisors is an integer number (3328644060).

Almost surely, 2^19970885157 is an apocalyptic number.

It is an amenable number.

19970885157 is a deficient number, since it is larger than the sum of its proper divisors (6658267323).

19970885157 is a wasteful number, since it uses less digits than its factorization.

19970885157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326403.

The product of its (nonzero) digits is 6350400, while the sum is 60.

The spelling of 19970885157 in words is "nineteen billion, nine hundred seventy million, eight hundred eighty-five thousand, one hundred fifty-seven".