20211157999 has 8 divisors (see below), whose sum is σ = 21750871248. Its totient is φ = 18710424960.

The previous prime is 20211157979. The next prime is 20211158027. The reversal of 20211157999 is 99975111202.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20211157999 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 (20211157909) 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, 9743977 + ... + 9746050.

It is an arithmetic number, because the mean of its divisors is an integer number (2718858906).

Almost surely, 2^20211157999 is an apocalyptic number.

20211157999 is a deficient number, since it is larger than the sum of its proper divisors (1539713249).

20211157999 is a wasteful number, since it uses less digits than its factorization.

20211157999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19490105.

The product of its (nonzero) digits is 102060, while the sum is 46.

The spelling of 20211157999 in words is "twenty billion, two hundred eleven million, one hundred fifty-seven thousand, nine hundred ninety-nine".