21266060 has 12 divisors (see below), whose sum is σ = 44658768. Its totient is φ = 8506416.

The previous prime is 21266059. The next prime is 21266071. The reversal of 21266060 is 6066212.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 531632 + ... + 531671.

It is an arithmetic number, because the mean of its divisors is an integer number (3721564).

Almost surely, 2^21266060 is an apocalyptic number.

21266060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21266060 is an abundant number, since it is smaller than the sum of its proper divisors (23392708).

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

21266060 is a wasteful number, since it uses less digits than its factorization.

21266060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1063312 (or 1063310 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 21266060 is about 4611.5138512207. The cubic root of 21266060 is about 277.0526732364.

The spelling of 21266060 in words is "twenty-one million, two hundred sixty-six thousand, sixty".