9018097972 has 24 divisors (see below), whose sum is σ = 16998345000. Its totient is φ = 4161538176.

The previous prime is 9018097937. The next prime is 9018097973. The reversal of 9018097972 is 2797908109.

It can be written as a sum of positive squares in 4 ways, for example, as 875923216 + 8142174756 = 29596^2 + 90234^2 .

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9018097973) 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, 498054 + ... + 515842.

It is an arithmetic number, because the mean of its divisors is an integer number (708264375).

Almost surely, 2^9018097972 is an apocalyptic number.

It is an amenable number.

9018097972 is a deficient number, since it is larger than the sum of its proper divisors (7980247028).

9018097972 is a wasteful number, since it uses less digits than its factorization.

9018097972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27555 (or 27553 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 52.

The square root of 9018097972 is about 94963.6665888591. Note that the first 3 decimals coincide. The cubic root of 9018097972 is about 2081.4771598472.

The spelling of 9018097972 in words is "nine billion, eighteen million, ninety-seven thousand, nine hundred seventy-two".