21274061757 has 32 divisors (see below), whose sum is σ = 30732710400. Its totient is φ = 13012503552.

The previous prime is 21274061737. The next prime is 21274061777. The reversal of 21274061757 is 75716047212.

It is an interprime number because it is at equal distance from previous prime (21274061737) and next prime (21274061777).

It is not a de Polignac number, because 21274061757 - 2¹⁵ = 21274028989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21274061737) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6419733 + ... + 6423045.

It is an arithmetic number, because the mean of its divisors is an integer number (960397200).

Almost surely, 2^21274061757 is an apocalyptic number.

It is an amenable number.

21274061757 is a deficient number, since it is larger than the sum of its proper divisors (9458648643).

21274061757 is a wasteful number, since it uses less digits than its factorization.

21274061757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4277.

The product of its (nonzero) digits is 164640, while the sum is 42.

The spelling of 21274061757 in words is "twenty-one billion, two hundred seventy-four million, sixty-one thousand, seven hundred fifty-seven".