21274063741 has 16 divisors (see below), whose sum is σ = 24455577600. Its totient is φ = 18128397168.

The previous prime is 21274063729. The next prime is 21274063781. The reversal of 21274063741 is 14736047212.

It is not a de Polignac number, because 21274063741 - 2²¹ = 21271966589 is a prime.

It is a super-2 number, since 2×21274063741² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21274063741.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21274063781) 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, 1025316 + ... + 1045858.

It is an arithmetic number, because the mean of its divisors is an integer number (1528473600).

Almost surely, 2^21274063741 is an apocalyptic number.

It is an amenable number.

21274063741 is a deficient number, since it is larger than the sum of its proper divisors (3181513859).

21274063741 is a wasteful number, since it uses less digits than its factorization.

21274063741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21408.

The product of its (nonzero) digits is 56448, while the sum is 37.

The spelling of 21274063741 in words is "twenty-one billion, two hundred seventy-four million, sixty-three thousand, seven hundred forty-one".