15220742218 has 24 divisors (see below), whose sum is σ = 25343865540. Its totient is φ = 6850008000.

The previous prime is 15220742183. The next prime is 15220742227. The reversal of 15220742218 is 81224702251.

It can be written as a sum of positive squares in 2 ways, for example, as 14184095409 + 1036646809 = 119097^2 + 32197^2 .

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 286923 + ... + 335806.

Almost surely, 2^15220742218 is an apocalyptic number.

15220742218 is a deficient number, since it is larger than the sum of its proper divisors (10123123322).

15220742218 is a wasteful number, since it uses less digits than its factorization.

15220742218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622854 (or 622843 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 34.

The spelling of 15220742218 in words is "fifteen billion, two hundred twenty million, seven hundred forty-two thousand, two hundred eighteen".