21496700 has 18 divisors (see below), whose sum is σ = 46648056. Its totient is φ = 8598640.

The previous prime is 21496679. The next prime is 21496703. The reversal of 21496700 is 769412.

It is a super-2 number, since 2×21496700² = 924216221780000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21496703) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 107384 + ... + 107583.

Almost surely, 2^21496700 is an apocalyptic number.

21496700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21496700 is an abundant number, since it is smaller than the sum of its proper divisors (25151356).

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

21496700 is a wasteful number, since it uses less digits than its factorization.

21496700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214981 (or 214974 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 21496700 is about 4636.4533859406. The cubic root of 21496700 is about 278.0506610224.

The spelling of 21496700 in words is "twenty-one million, four hundred ninety-six thousand, seven hundred".