21274367276 has 6 divisors (see below), whose sum is σ = 37230142740. Its totient is φ = 10637183636.

The previous prime is 21274367269. The next prime is 21274367299. The reversal of 21274367276 is 67276347212.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 21274367276.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2659295906 + ... + 2659295913.

It is an arithmetic number, because the mean of its divisors is an integer number (6205023790).

Almost surely, 2^21274367276 is an apocalyptic number.

It is an amenable number.

21274367276 is a deficient number, since it is larger than the sum of its proper divisors (15955775464).

21274367276 is a wasteful number, since it uses less digits than its factorization.

21274367276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5318591823 (or 5318591821 counting only the distinct ones).

The product of its digits is 1185408, while the sum is 47.

The spelling of 21274367276 in words is "twenty-one billion, two hundred seventy-four million, three hundred sixty-seven thousand, two hundred seventy-six".