21140465061 has 8 divisors (see below), whose sum is σ = 28649373664. Its totient is φ = 13862599920.

The previous prime is 21140465051. The next prime is 21140465069. The reversal of 21140465061 is 16056404112.

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

It is not a de Polignac number, because 21140465061 - 2²⁶ = 21073356197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21140465069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57760651 + ... + 57761016.

It is an arithmetic number, because the mean of its divisors is an integer number (3581171708).

Almost surely, 2^21140465061 is an apocalyptic number.

It is an amenable number.

21140465061 is a deficient number, since it is larger than the sum of its proper divisors (7508908603).

21140465061 is a wasteful number, since it uses less digits than its factorization.

21140465061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115521731.

The product of its (nonzero) digits is 5760, while the sum is 30.

Adding to 21140465061 its reverse (16056404112), we get a palindrome (37196869173).

The spelling of 21140465061 in words is "twenty-one billion, one hundred forty million, four hundred sixty-five thousand, sixty-one".