21467380 has 24 divisors (see below), whose sum is σ = 49180320. Its totient is φ = 7806240.

The previous prime is 21467377. The next prime is 21467389. The reversal of 21467380 is 8376412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21467389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48570 + ... + 49009.

It is an arithmetic number, because the mean of its divisors is an integer number (2049180).

Almost surely, 2^21467380 is an apocalyptic number.

21467380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21467380 is an abundant number, since it is smaller than the sum of its proper divisors (27712940).

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

21467380 is a wasteful number, since it uses less digits than its factorization.

21467380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97599 (or 97597 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 21467380 is about 4633.2904074750. The cubic root of 21467380 is about 277.9241896005.

The spelling of 21467380 in words is "twenty-one million, four hundred sixty-seven thousand, three hundred eighty".