20249390115 has 48 divisors (see below), whose sum is σ = 37772912736. Its totient is φ = 9997747200.

The previous prime is 20249390053. The next prime is 20249390129. The reversal of 20249390115 is 51109394202.

20249390115 is a `hidden beast` number, since 20 + 249 + 390 + 1 + 1 + 5 = 666.

It is not a de Polignac number, because 20249390115 - 2⁹ = 20249389603 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20249390115.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 170301 + ... + 263630.

It is an arithmetic number, because the mean of its divisors is an integer number (786935682).

Almost surely, 2^20249390115 is an apocalyptic number.

20249390115 is a deficient number, since it is larger than the sum of its proper divisors (17523522621).

20249390115 is a wasteful number, since it uses less digits than its factorization.

20249390115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434020 (or 434017 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The spelling of 20249390115 in words is "twenty billion, two hundred forty-nine million, three hundred ninety thousand, one hundred fifteen".