21274617241767 has 16 divisors (see below), whose sum is σ = 28390656678912. Its totient is φ = 14170833266880.

The previous prime is 21274617241753. The next prime is 21274617241769. The reversal of 21274617241767 is 76714271647212.

It is not a de Polignac number, because 21274617241767 - 2¹⁴ = 21274617225383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21274617241769) 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, 15503688 + ... + 16820034.

It is an arithmetic number, because the mean of its divisors is an integer number (1774416042432).

Almost surely, 2^{21274617241767} is an apocalyptic number.

21274617241767 is a deficient number, since it is larger than the sum of its proper divisors (7116039437145).

21274617241767 is a wasteful number, since it uses less digits than its factorization.

21274617241767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1320998.

The product of its digits is 11063808, while the sum is 57.

Adding to 21274617241767 its reverse (76714271647212), we get a palindrome (97988888888979).

The spelling of 21274617241767 in words is "twenty-one trillion, two hundred seventy-four billion, six hundred seventeen million, two hundred forty-one thousand, seven hundred sixty-seven".