20677480 has 32 divisors (see below), whose sum is σ = 46656000. Its totient is φ = 8247616.

The previous prime is 20677477. The next prime is 20677507. The reversal of 20677480 is 8477602.

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, 23529 + ... + 24391.

It is an arithmetic number, because the mean of its divisors is an integer number (1458000).

Almost surely, 2^20677480 is an apocalyptic number.

20677480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20677480 is an abundant number, since it is smaller than the sum of its proper divisors (25978520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20677480 is a wasteful number, since it uses less digits than its factorization.

20677480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1473 (or 1469 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 20677480 is about 4547.2497182363. The cubic root of 20677480 is about 274.4727307370.

The spelling of 20677480 in words is "twenty million, six hundred seventy-seven thousand, four hundred eighty".