9972018146 has 4 divisors (see below), whose sum is σ = 14958027222. Its totient is φ = 4986009072.

The previous prime is 9972018143. The next prime is 9972018169. The reversal of 9972018146 is 6418102799.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 9818629921 + 153388225 = 99089^2 + 12385^2 .

It is a super-2 number, since 2×9972018146² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 9972018146.

It is not an unprimeable number, because it can be changed into a prime (9972018143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2493004535 + ... + 2493004538.

Almost surely, 2^9972018146 is an apocalyptic number.

9972018146 is a deficient number, since it is larger than the sum of its proper divisors (4986009076).

9972018146 is a wasteful number, since it uses less digits than its factorization.

9972018146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4986009075.

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 9972018146 is about 99859.9927198075. The cubic root of 9972018146 is about 2152.4233102275.

The spelling of 9972018146 in words is "nine billion, nine hundred seventy-two million, eighteen thousand, one hundred forty-six".