20401145754172 has 12 divisors (see below), whose sum is σ = 35729702522640. Its totient is φ = 10192659319136.

The previous prime is 20401145754137. The next prime is 20401145754247. The reversal of 20401145754172 is 27145754110402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1978383688 + ... + 1978393999.

It is an arithmetic number, because the mean of its divisors is an integer number (2977475210220).

Almost surely, 2^{20401145754172} is an apocalyptic number.

It is an amenable number.

20401145754172 is a deficient number, since it is larger than the sum of its proper divisors (15328556768468).

20401145754172 is a wasteful number, since it uses less digits than its factorization.

20401145754172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3956778980 (or 3956778978 counting only the distinct ones).

The product of its (nonzero) digits is 313600, while the sum is 43.

Adding to 20401145754172 its reverse (27145754110402), we get a palindrome (47546899864574).

The spelling of 20401145754172 in words is "twenty trillion, four hundred one billion, one hundred forty-five million, seven hundred fifty-four thousand, one hundred seventy-two".