21072607413 has 16 divisors (see below), whose sum is σ = 33008840256. Its totient is φ = 11788871040.

The previous prime is 21072607411. The next prime is 21072607417. The reversal of 21072607413 is 31470627012.

It is not a de Polignac number, because 21072607413 - 2¹ = 21072607411 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21072607411) 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, 24559720 + ... + 24560577.

It is an arithmetic number, because the mean of its divisors is an integer number (2063052516).

Almost surely, 2^21072607413 is an apocalyptic number.

It is an amenable number.

21072607413 is a deficient number, since it is larger than the sum of its proper divisors (11936232843).

21072607413 is a wasteful number, since it uses less digits than its factorization.

21072607413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49120324.

The product of its (nonzero) digits is 14112, while the sum is 33.

The spelling of 21072607413 in words is "twenty-one billion, seventy-two million, six hundred seven thousand, four hundred thirteen".