21140496 has 120 divisors (see below), whose sum is σ = 66620736. Its totient is φ = 6209280.

The previous prime is 21140423. The next prime is 21140501. The reversal of 21140496 is 69404112.

It is a super-2 number, since 2×21140496² = 893841142252032, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42811 + ... + 43301.

Almost surely, 2^21140496 is an apocalyptic number.

21140496 is a gapful number since it is divisible by the number (26) 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 21140496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33310368).

21140496 is an abundant number, since it is smaller than the sum of its proper divisors (45480240).

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

21140496 is a wasteful number, since it uses less digits than its factorization.

21140496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541 (or 532 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 21140496 is about 4597.8795112530. The cubic root of 21140496 is about 276.5063169795.

The spelling of 21140496 in words is "twenty-one million, one hundred forty thousand, four hundred ninety-six".