21501096 has 16 divisors (see below), whose sum is σ = 53752800. Its totient is φ = 7167024.

The previous prime is 21501091. The next prime is 21501101. The reversal of 21501096 is 69010512.

It is an interprime number because it is at equal distance from previous prime (21501091) and next prime (21501101).

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 895879 = 21501096 / (2 + 1 + 5 + 0 + 1 + 0 + 9 + 6).

It is not an unprimeable number, because it can be changed into a prime (21501091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 447916 + ... + 447963.

It is an arithmetic number, because the mean of its divisors is an integer number (3359550).

Almost surely, 2^21501096 is an apocalyptic number.

It is an amenable number.

21501096 is an abundant number, since it is smaller than the sum of its proper divisors (32251704).

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

21501096 is a wasteful number, since it uses less digits than its factorization.

21501096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 895888 (or 895884 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 21501096 is about 4636.9274309612. The cubic root of 21501096 is about 278.0696131933.

The spelling of 21501096 in words is "twenty-one million, five hundred one thousand, ninety-six".