21480693 has 16 divisors (see below), whose sum is σ = 31563840. Its totient is φ = 12910464.

The previous prime is 21480691. The next prime is 21480713. The reversal of 21480693 is 39608412.

It is not a de Polignac number, because 21480693 - 2¹ = 21480691 is a prime.

It is a super-2 number, since 2×21480693² = 922840343520498, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21480691) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4728 + ... + 8081.

It is an arithmetic number, because the mean of its divisors is an integer number (1972740).

Almost surely, 2^21480693 is an apocalyptic number.

It is an amenable number.

21480693 is a deficient number, since it is larger than the sum of its proper divisors (10083147).

21480693 is a wasteful number, since it uses less digits than its factorization.

21480693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12868.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 21480693 is about 4634.7268527929. The cubic root of 21480693 is about 277.9816293090.

The spelling of 21480693 in words is "twenty-one million, four hundred eighty thousand, six hundred ninety-three".