20157887815226 has 32 divisors (see below), whose sum is σ = 36627990918912. Its totient is φ = 8122271927040.

The previous prime is 20157887815199. The next prime is 20157887815279. The reversal of 20157887815226 is 62251878875102.

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 44779766 + ... + 45227681.

It is an arithmetic number, because the mean of its divisors is an integer number (1144624716216).

Almost surely, 2^{20157887815226} is an apocalyptic number.

20157887815226 is a deficient number, since it is larger than the sum of its proper divisors (16470103103686).

20157887815226 is a wasteful number, since it uses less digits than its factorization.

20157887815226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90008414.

The product of its (nonzero) digits is 30105600, while the sum is 62.

The spelling of 20157887815226 in words is "twenty trillion, one hundred fifty-seven billion, eight hundred eighty-seven million, eight hundred fifteen thousand, two hundred twenty-six".