18537225963 has 16 divisors (see below), whose sum is σ = 24807192576. Its totient is φ = 12312790560.

The previous prime is 18537225881. The next prime is 18537226007. The reversal of 18537225963 is 36952273581.

It is not a de Polignac number, because 18537225963 - 2¹⁰ = 18537224939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18537225263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 903606 + ... + 923892.

It is an arithmetic number, because the mean of its divisors is an integer number (1550449536).

Almost surely, 2^18537225963 is an apocalyptic number.

18537225963 is a deficient number, since it is larger than the sum of its proper divisors (6269966613).

18537225963 is a wasteful number, since it uses less digits than its factorization.

18537225963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21394.

The product of its digits is 2721600, while the sum is 51.

The spelling of 18537225963 in words is "eighteen billion, five hundred thirty-seven million, two hundred twenty-five thousand, nine hundred sixty-three".