21732854 has 16 divisors (see below), whose sum is σ = 38298960. Its totient is φ = 9118560.

The previous prime is 21732839. The next prime is 21732859. The reversal of 21732854 is 45823712.

It is a self number, because there is not a number n which added to its sum of digits gives 21732854.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21732859) 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, 37709 + ... + 38280.

It is an arithmetic number, because the mean of its divisors is an integer number (2393685).

Almost surely, 2^21732854 is an apocalyptic number.

21732854 is a deficient number, since it is larger than the sum of its proper divisors (16566106).

21732854 is a wasteful number, since it uses less digits than its factorization.

21732854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76015.

The product of its digits is 13440, while the sum is 32.

The square root of 21732854 is about 4661.8509199673. The cubic root of 21732854 is about 279.0651389724.

The spelling of 21732854 in words is "twenty-one million, seven hundred thirty-two thousand, eight hundred fifty-four".