20013123660454 has 32 divisors (see below), whose sum is σ = 31896028523520. Its totient is φ = 9385257677952.

The previous prime is 20013123660451. The next prime is 20013123660469. The reversal of 20013123660454 is 45406632131002.

It is a super-2 number, since 2×20013123660454² (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 (20013123660451) 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, 11588787 + ... + 13203265.

It is an arithmetic number, because the mean of its divisors is an integer number (996750891360).

Almost surely, 2^{20013123660454} is an apocalyptic number.

20013123660454 is a deficient number, since it is larger than the sum of its proper divisors (11882904863066).

20013123660454 is a wasteful number, since it uses less digits than its factorization.

20013123660454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1615764.

The product of its (nonzero) digits is 103680, while the sum is 37.

Adding to 20013123660454 its reverse (45406632131002), we get a palindrome (65419755791456).

The spelling of 20013123660454 in words is "twenty trillion, thirteen billion, one hundred twenty-three million, six hundred sixty thousand, four hundred fifty-four".