21864276254 has 16 divisors (see below), whose sum is σ = 33859071360. Its totient is φ = 10578017280.

The previous prime is 21864276253. The next prime is 21864276293. The reversal of 21864276254 is 45267246812.

It is a super-2 number, since 2×21864276254² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21864276199 and 21864276208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21864276253) 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, 522542 + ... + 562830.

It is an arithmetic number, because the mean of its divisors is an integer number (2116191960).

Almost surely, 2^21864276254 is an apocalyptic number.

21864276254 is a deficient number, since it is larger than the sum of its proper divisors (11994795106).

21864276254 is a wasteful number, since it uses less digits than its factorization.

21864276254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49075.

The product of its digits is 1290240, while the sum is 47.

The spelling of 21864276254 in words is "twenty-one billion, eight hundred sixty-four million, two hundred seventy-six thousand, two hundred fifty-four".