20402542115 has 16 divisors (see below), whose sum is σ = 25433308800. Its totient is φ = 15693240192.

The previous prime is 20402542093. The next prime is 20402542157. The reversal of 20402542115 is 51124520402.

It is a cyclic number.

It is not a de Polignac number, because 20402542115 - 2¹² = 20402538019 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 259712 + ... + 329021.

It is an arithmetic number, because the mean of its divisors is an integer number (1589581800).

Almost surely, 2^20402542115 is an apocalyptic number.

20402542115 is a deficient number, since it is larger than the sum of its proper divisors (5030766685).

20402542115 is a wasteful number, since it uses less digits than its factorization.

20402542115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589006.

The product of its (nonzero) digits is 3200, while the sum is 26.

The spelling of 20402542115 in words is "twenty billion, four hundred two million, five hundred forty-two thousand, one hundred fifteen".