20115052021 has 8 divisors (see below), whose sum is σ = 20322086400. Its totient is φ = 19909061232.

The previous prime is 20115051973. The next prime is 20115052037. The reversal of 20115052021 is 12025051102.

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

It is a cyclic number.

It is not a de Polignac number, because 20115052021 - 2²⁹ = 19578181109 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20115052021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20115052081) 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, 222121 + ... + 299278.

It is an arithmetic number, because the mean of its divisors is an integer number (2540260800).

Almost surely, 2^20115052021 is an apocalyptic number.

It is an amenable number.

20115052021 is a deficient number, since it is larger than the sum of its proper divisors (207034379).

20115052021 is a wasteful number, since it uses less digits than its factorization.

20115052021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521795.

The product of its (nonzero) digits is 200, while the sum is 19.

The spelling of 20115052021 in words is "twenty billion, one hundred fifteen million, fifty-two thousand, twenty-one".