60918021 has 48 divisors (see below), whose sum is σ = 98927680. Its totient is φ = 37013760.

The previous prime is 60918017. The next prime is 60918023. The reversal of 60918021 is 12081906.

It is not a de Polignac number, because 60918021 - 2² = 60918017 is a prime.

It is a super-2 number, since 2×60918021² = 7422010565112882, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (60918023) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 288606 + ... + 288816.

Almost surely, 2^60918021 is an apocalyptic number.

It is an amenable number.

60918021 is a deficient number, since it is larger than the sum of its proper divisors (38009659).

60918021 is a wasteful number, since it uses less digits than its factorization.

60918021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291 (or 268 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 60918021 is about 7804.9997437540. Note that the first 3 decimals coincide. The cubic root of 60918021 is about 393.4732949354.

Adding to 60918021 its reverse (12081906), we get a palindrome (72999927).

The spelling of 60918021 in words is "sixty million, nine hundred eighteen thousand, twenty-one".