21266262 has 24 divisors (see below), whose sum is σ = 46234656. Its totient is φ = 7064496.

The previous prime is 21266239. The next prime is 21266291. The reversal of 21266262 is 26266212.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3843 + ... + 7569.

It is an arithmetic number, because the mean of its divisors is an integer number (1926444).

Almost surely, 2^21266262 is an apocalyptic number.

21266262 is an abundant number, since it is smaller than the sum of its proper divisors (24968394).

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

21266262 is a wasteful number, since it uses less digits than its factorization.

21266262 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4052 (or 4049 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 21266262 is about 4611.5357528702. The cubic root of 21266262 is about 277.0535504474.

It can be divided in two parts, 21266 and 262, that added together give a triangular number (21528 = T₂₀₇).

The spelling of 21266262 in words is "twenty-one million, two hundred sixty-six thousand, two hundred sixty-two".