72101918 has 16 divisors (see below), whose sum is σ = 128977920. Its totient is φ = 29557176.

The previous prime is 72101857. The next prime is 72101951. The reversal of 72101918 is 81910127.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111638 + ... + 112281.

It is an arithmetic number, because the mean of its divisors is an integer number (8061120).

Almost surely, 2^72101918 is an apocalyptic number.

72101918 is a deficient number, since it is larger than the sum of its proper divisors (56876002).

72101918 is a wasteful number, since it uses less digits than its factorization.

72101918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223951.

The product of its (nonzero) digits is 1008, while the sum is 29.

The square root of 72101918 is about 8491.2848262204. The cubic root of 72101918 is about 416.2129664919.

The spelling of 72101918 in words is "seventy-two million, one hundred one thousand, nine hundred eighteen".