21140412415 has 16 divisors (see below), whose sum is σ = 27354993120. Its totient is φ = 15631418880.

The previous prime is 21140412409. The next prime is 21140412427. The reversal of 21140412415 is 51421404112.

It is not a de Polignac number, because 21140412415 - 2¹³ = 21140404223 is a prime.

It is a super-2 number, since 2×21140412415² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21140412415.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2709894 + ... + 2717683.

It is an arithmetic number, because the mean of its divisors is an integer number (1709687070).

Almost surely, 2^21140412415 is an apocalyptic number.

21140412415 is a deficient number, since it is larger than the sum of its proper divisors (6214580705).

21140412415 is a wasteful number, since it uses less digits than its factorization.

21140412415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5427642.

The product of its (nonzero) digits is 1280, while the sum is 25.

Adding to 21140412415 its reverse (51421404112), we get a palindrome (72561816527).

The spelling of 21140412415 in words is "twenty-one billion, one hundred forty million, four hundred twelve thousand, four hundred fifteen".