21889035 has 60 divisors (see below), whose sum is σ = 45685728. Its totient is φ = 9997344.

The previous prime is 21889019. The next prime is 21889061. The reversal of 21889035 is 53098812.

It is not a de Polignac number, because 21889035 - 2⁴ = 21889019 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 19294 + ... + 20396.

Almost surely, 2^21889035 is an apocalyptic number.

21889035 is an abundant number, since it is smaller than the sum of its proper divisors (23796693).

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

21889035 is a wasteful number, since it uses less digits than its factorization.

21889035 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1134 (or 1118 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 21889035 is about 4678.5718974918. The cubic root of 21889035 is about 279.7320353018.

It can be divided in two parts, 218 and 89035, that added together give a triangular number (89253 = T₄₂₂).

The spelling of 21889035 in words is "twenty-one million, eight hundred eighty-nine thousand, thirty-five".