20115242658 has 48 divisors (see below), whose sum is σ = 52430713920. Its totient is φ = 5444726688.

The previous prime is 20115242657. The next prime is 20115242683. The reversal of 20115242658 is 85624251102.

It is not an unprimeable number, because it can be changed into a prime (20115242657) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4198785 + ... + 4203572.

It is an arithmetic number, because the mean of its divisors is an integer number (1092306540).

Almost surely, 2^20115242658 is an apocalyptic number.

20115242658 is an abundant number, since it is smaller than the sum of its proper divisors (32315471262).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20115242658 is a wasteful number, since it uses less digits than its factorization.

20115242658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8402391 (or 8402388 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The spelling of 20115242658 in words is "twenty billion, one hundred fifteen million, two hundred forty-two thousand, six hundred fifty-eight".