18937088722 has 4 divisors (see below), whose sum is σ = 28405633086. Its totient is φ = 9468544360.

The previous prime is 18937088717. The next prime is 18937088773. The reversal of 18937088722 is 22788073981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22788073981 = 73 ⋅312165397.

It can be written as a sum of positive squares in only one way, i.e., 18936787321 + 301401 = 137611^2 + 549^2 .

It is a super-2 number, since 2×18937088722² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4734272179 + ... + 4734272182.

Almost surely, 2^18937088722 is an apocalyptic number.

18937088722 is a deficient number, since it is larger than the sum of its proper divisors (9468544364).

18937088722 is an equidigital number, since it uses as much as digits as its factorization.

18937088722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9468544363.

The product of its (nonzero) digits is 2709504, while the sum is 55.

The spelling of 18937088722 in words is "eighteen billion, nine hundred thirty-seven million, eighty-eight thousand, seven hundred twenty-two".