21325164403 has 8 divisors (see below), whose sum is σ = 22253833728. Its totient is φ = 20396619144.

The previous prime is 21325164299. The next prime is 21325164409. The reversal of 21325164403 is 30446152312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21325164403 - 2²⁵ = 21291609971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21325164409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 560326 + ... + 597172.

It is an arithmetic number, because the mean of its divisors is an integer number (2781729216).

Almost surely, 2^21325164403 is an apocalyptic number.

21325164403 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21325164403 is a deficient number, since it is larger than the sum of its proper divisors (928669325).

21325164403 is a wasteful number, since it uses less digits than its factorization.

21325164403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62033.

The product of its (nonzero) digits is 17280, while the sum is 31.

The spelling of 21325164403 in words is "twenty-one billion, three hundred twenty-five million, one hundred sixty-four thousand, four hundred three".