21262854 has 16 divisors (see below), whose sum is σ = 42572592. Its totient is φ = 7079808.

The previous prime is 21262853. The next prime is 21262859. The reversal of 21262854 is 45826212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21262853) 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, 7362 + ... + 9834.

It is an arithmetic number, because the mean of its divisors is an integer number (2660787).

Almost surely, 2^21262854 is an apocalyptic number.

21262854 is an abundant number, since it is smaller than the sum of its proper divisors (21309738).

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

21262854 is a wasteful number, since it uses less digits than its factorization.

21262854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3911.

The product of its digits is 7680, while the sum is 30.

The square root of 21262854 is about 4611.1662299249. The cubic root of 21262854 is about 277.0387500256.

The spelling of 21262854 in words is "twenty-one million, two hundred sixty-two thousand, eight hundred fifty-four".