21873487254093 has 32 divisors (see below), whose sum is σ = 34958736604800. Its totient is φ = 13465587403008.

The previous prime is 21873487254049. The next prime is 21873487254107. The reversal of 21873487254093 is 39045278437812.

It is a happy number.

21873487254093 is a `hidden beast` number, since 2 + 1 + 8 + 7 + 3 + 4 + 87 + 2 + 540 + 9 + 3 = 666.

It is not a de Polignac number, because 21873487254093 - 2²⁰ = 21873486205517 is a prime.

It is a super-3 number, since 3×21873487254093³ (a number of 41 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21873487254093.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21873487254013) 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, 449547903 + ... + 449596556.

It is an arithmetic number, because the mean of its divisors is an integer number (1092460518900).

Almost surely, 2^{21873487254093} is an apocalyptic number.

It is an amenable number.

21873487254093 is a deficient number, since it is larger than the sum of its proper divisors (13085249350707).

21873487254093 is a wasteful number, since it uses less digits than its factorization.

21873487254093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 899144538 (or 899144532 counting only the distinct ones).

The product of its (nonzero) digits is 81285120, while the sum is 63.

The spelling of 21873487254093 in words is "twenty-one trillion, eight hundred seventy-three billion, four hundred eighty-seven million, two hundred fifty-four thousand, ninety-three".