18858410513421 has 16 divisors (see below), whose sum is σ = 27183294436800. Its totient is φ = 11588667625728.

The previous prime is 18858410513413. The next prime is 18858410513431. The reversal of 18858410513421 is 12431501485881.

It is a happy number.

It is not a de Polignac number, because 18858410513421 - 2³ = 18858410513413 is a prime.

It is a super-2 number, since 2×18858410513421² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18858410513431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4470934476 + ... + 4470938693.

It is an arithmetic number, because the mean of its divisors is an integer number (1698955902300).

Almost surely, 2^{18858410513421} is an apocalyptic number.

It is an amenable number.

18858410513421 is a deficient number, since it is larger than the sum of its proper divisors (8324883923379).

18858410513421 is a wasteful number, since it uses less digits than its factorization.

18858410513421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8941873228.

The product of its (nonzero) digits is 1228800, while the sum is 51.

The spelling of 18858410513421 in words is "eighteen trillion, eight hundred fifty-eight billion, four hundred ten million, five hundred thirteen thousand, four hundred twenty-one".