21266563362 has 24 divisors (see below), whose sum is σ = 46751289648. Its totient is φ = 6444412920.

The previous prime is 21266563349. The next prime is 21266563387. The reversal of 21266563362 is 26336566212.

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, 14645668 + ... + 14647119.

It is an arithmetic number, because the mean of its divisors is an integer number (1947970402).

Almost surely, 2^21266563362 is an apocalyptic number.

21266563362 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21266563362 is an abundant number, since it is smaller than the sum of its proper divisors (25484726286).

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

21266563362 is a wasteful number, since it uses less digits than its factorization.

21266563362 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29292814 (or 29292803 counting only the distinct ones).

The product of its digits is 466560, while the sum is 42.

The spelling of 21266563362 in words is "twenty-one billion, two hundred sixty-six million, five hundred sixty-three thousand, three hundred sixty-two".