15320214021 has 64 divisors (see below), whose sum is σ = 24547635200. Its totient is φ = 8490484800.

The previous prime is 15320213983. The next prime is 15320214023. The reversal of 15320214021 is 12041202351.

It is not a de Polignac number, because 15320214021 - 2²² = 15316019717 is a prime.

It is a super-3 number, since 3×15320214021³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15320214023) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6680151 + ... + 6682443.

It is an arithmetic number, because the mean of its divisors is an integer number (383556800).

Almost surely, 2^15320214021 is an apocalyptic number.

It is an amenable number.

15320214021 is a deficient number, since it is larger than the sum of its proper divisors (9227421179).

15320214021 is a wasteful number, since it uses less digits than its factorization.

15320214021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2511 (or 2497 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 15320214021 its reverse (12041202351), we get a palindrome (27361416372).

The spelling of 15320214021 in words is "fifteen billion, three hundred twenty million, two hundred fourteen thousand, twenty-one".