21274742001 has 8 divisors (see below), whose sum is σ = 28371770464. Its totient is φ = 14180437440.

The previous prime is 21274741913. The next prime is 21274742039. The reversal of 21274742001 is 10024747212.

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

It is not a de Polignac number, because 21274742001 - 2¹⁴ = 21274725617 is a prime.

It is a super-2 number, since 2×21274742001² (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 21274742001.

It is not an unprimeable number, because it can be changed into a prime (21274742201) 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, 662680 + ... + 694041.

It is an arithmetic number, because the mean of its divisors is an integer number (3546471308).

Almost surely, 2^21274742001 is an apocalyptic number.

It is an amenable number.

21274742001 is a deficient number, since it is larger than the sum of its proper divisors (7097028463).

21274742001 is a wasteful number, since it uses less digits than its factorization.

21274742001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1361951.

The product of its (nonzero) digits is 6272, while the sum is 30.

The spelling of 21274742001 in words is "twenty-one billion, two hundred seventy-four million, seven hundred forty-two thousand, one".