21214036536407 has 16 divisors (see below), whose sum is σ = 25169544439200. Its totient is φ = 17625731376000.

The previous prime is 21214036536403. The next prime is 21214036536449. The reversal of 21214036536407 is 70463563041212.

It is not a de Polignac number, because 21214036536407 - 2² = 21214036536403 is a prime.

It is a super-2 number, since 2×21214036536407² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21214036536401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 734391032 + ... + 734419917.

It is an arithmetic number, because the mean of its divisors is an integer number (1573096527450).

Almost surely, 2^{21214036536407} is an apocalyptic number.

21214036536407 is a deficient number, since it is larger than the sum of its proper divisors (3955507902793).

21214036536407 is a wasteful number, since it uses less digits than its factorization.

21214036536407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1468811074.

The product of its (nonzero) digits is 725760, while the sum is 44.

Adding to 21214036536407 its reverse (70463563041212), we get a palindrome (91677599577619).

The spelling of 21214036536407 in words is "twenty-one trillion, two hundred fourteen billion, thirty-six million, five hundred thirty-six thousand, four hundred seven".