21935088 has 120 divisors (see below), whose sum is σ = 71804928. Its totient is φ = 6120576.

The previous prime is 21935071. The next prime is 21935119. The reversal of 21935088 is 88053912.

It is a super-2 number, since 2×21935088² = 962296171135488, which contains 22 as substring.

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

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47145 + ... + 47607.

Almost surely, 2^21935088 is an apocalyptic number.

21935088 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21935088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35902464).

21935088 is an abundant number, since it is smaller than the sum of its proper divisors (49869840).

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

21935088 is a wasteful number, since it uses less digits than its factorization.

21935088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531 (or 522 counting only the distinct ones).

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

The square root of 21935088 is about 4683.4910056495. The cubic root of 21935088 is about 279.9280767648.

The spelling of 21935088 in words is "twenty-one million, nine hundred thirty-five thousand, eighty-eight".