21263334402 has 16 divisors (see below), whose sum is σ = 42529766400. Its totient is φ = 7087261872.

The previous prime is 21263334371. The next prime is 21263334497. The reversal of 21263334402 is 20443336212.

It is a self number, because there is not a number n which added to its sum of digits gives 21263334402.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34498 + ... + 209085.

It is an arithmetic number, because the mean of its divisors is an integer number (2658110400).

Almost surely, 2^21263334402 is an apocalyptic number.

21263334402 is an abundant number, since it is smaller than the sum of its proper divisors (21266431998).

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

21263334402 is a wasteful number, since it uses less digits than its factorization.

21263334402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258137.

The product of its (nonzero) digits is 20736, while the sum is 30.

The spelling of 21263334402 in words is "twenty-one billion, two hundred sixty-three million, three hundred thirty-four thousand, four hundred two".