72020318 has 4 divisors (see below), whose sum is σ = 108030480. Its totient is φ = 36010158.

The previous prime is 72020293. The next prime is 72020327. The reversal of 72020318 is 81302027.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81302027 = 397 ⋅204791.

It is a super-2 number, since 2×72020318² = 10373852409642248, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 72020293 and 72020302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18005078 + ... + 18005081.

It is an arithmetic number, because the mean of its divisors is an integer number (27007620).

Almost surely, 2^72020318 is an apocalyptic number.

72020318 is a deficient number, since it is larger than the sum of its proper divisors (36010162).

72020318 is a wasteful number, since it uses less digits than its factorization.

72020318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36010161.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 72020318 is about 8486.4785394179. The cubic root of 72020318 is about 416.0558934699.

The spelling of 72020318 in words is "seventy-two million, twenty thousand, three hundred eighteen".