18537970090 has 16 divisors (see below), whose sum is σ = 33403599072. Its totient is φ = 7407354064.

The previous prime is 18537970081. The next prime is 18537970091. The reversal of 18537970090 is 9007973581.

It is not an unprimeable number, because it can be changed into a prime (18537970091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 969304 + ... + 988243.

It is an arithmetic number, because the mean of its divisors is an integer number (2087724942).

Almost surely, 2^18537970090 is an apocalyptic number.

18537970090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18537970090 is a deficient number, since it is larger than the sum of its proper divisors (14865628982).

18537970090 is a wasteful number, since it uses less digits than its factorization.

18537970090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1958501.

The product of its (nonzero) digits is 476280, while the sum is 49.

The spelling of 18537970090 in words is "eighteen billion, five hundred thirty-seven million, nine hundred seventy thousand, ninety".