21190092 has 192 divisors, whose sum is σ = 69672960. Its totient is φ = 4838400.

The previous prime is 21190079. The next prime is 21190093. The reversal of 21190092 is 29009112.

21190092 = 1624² + 1625² + ... + 1631².

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21190093) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 298417 + ... + 298487.

It is an arithmetic number, because the mean of its divisors is an integer number (362880).

Almost surely, 2^21190092 is an apocalyptic number.

21190092 is a gapful number since it is divisible by the number (22) 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 21190092, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34836480).

21190092 is an abundant number, since it is smaller than the sum of its proper divisors (48482868).

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

21190092 is a wasteful number, since it uses less digits than its factorization.

21190092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132 (or 130 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 21190092 is about 4603.2697075014. The cubic root of 21190092 is about 276.7223777747.

The spelling of 21190092 in words is "twenty-one million, one hundred ninety thousand, ninety-two".