20468540538454 has 16 divisors (see below), whose sum is σ = 31223635125840. Its totient is φ = 10060667026560.

The previous prime is 20468540538451. The next prime is 20468540538461. The reversal of 20468540538454 is 45483504586402.

It is a super-2 number, since 2×20468540538454² (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 (20468540538451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7501162 + ... + 9859234.

It is an arithmetic number, because the mean of its divisors is an integer number (1951477195365).

Almost surely, 2^{20468540538454} is an apocalyptic number.

20468540538454 is a deficient number, since it is larger than the sum of its proper divisors (10755094587386).

20468540538454 is a wasteful number, since it uses less digits than its factorization.

20468540538454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2431695.

The product of its (nonzero) digits is 73728000, while the sum is 58.

The spelling of 20468540538454 in words is "twenty trillion, four hundred sixty-eight billion, five hundred forty million, five hundred thirty-eight thousand, four hundred fifty-four".