20867480 has 32 divisors (see below), whose sum is σ = 47174400. Its totient is φ = 8307456.

The previous prime is 20867479. The next prime is 20867489. The reversal of 20867480 is 8476802.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 20867480.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20867489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8201 + ... + 10439.

It is an arithmetic number, because the mean of its divisors is an integer number (1474200).

Almost surely, 2^20867480 is an apocalyptic number.

20867480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20867480 is an abundant number, since it is smaller than the sum of its proper divisors (26306920).

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

20867480 is a wasteful number, since it uses less digits than its factorization.

20867480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2483 (or 2479 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 20867480 is about 4568.0936943106. The cubic root of 20867480 is about 275.3108550941.

The spelling of 20867480 in words is "twenty million, eight hundred sixty-seven thousand, four hundred eighty".