19701827157 has 8 divisors (see below), whose sum is σ = 26275408576. Its totient is φ = 13131398592.

The previous prime is 19701826987. The next prime is 19701827177. The reversal of 19701827157 is 75172810791.

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

It is not a de Polignac number, because 19701827157 - 2¹⁵ = 19701794389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19701827177) 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, 773593 + ... + 798654.

It is an arithmetic number, because the mean of its divisors is an integer number (3284426072).

Almost surely, 2^19701827157 is an apocalyptic number.

It is an amenable number.

19701827157 is a deficient number, since it is larger than the sum of its proper divisors (6573581419).

19701827157 is a wasteful number, since it uses less digits than its factorization.

19701827157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1576427.

The product of its (nonzero) digits is 246960, while the sum is 48.

The spelling of 19701827157 in words is "nineteen billion, seven hundred one million, eight hundred twenty-seven thousand, one hundred fifty-seven".