20138171072403 has 16 divisors (see below), whose sum is σ = 26886979629216. Its totient is φ = 13407410346240.

The previous prime is 20138171072347. The next prime is 20138171072419. The reversal of 20138171072403 is 30427017183102.

It is not a de Polignac number, because 20138171072403 - 2¹² = 20138171068307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20138170072403) 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, 14326951 + ... + 15669647.

It is an arithmetic number, because the mean of its divisors is an integer number (1680436226826).

Almost surely, 2^{20138171072403} is an apocalyptic number.

20138171072403 is a deficient number, since it is larger than the sum of its proper divisors (6748808556813).

20138171072403 is a wasteful number, since it uses less digits than its factorization.

20138171072403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1349414.

The product of its (nonzero) digits is 56448, while the sum is 39.

The spelling of 20138171072403 in words is "twenty trillion, one hundred thirty-eight billion, one hundred seventy-one million, seventy-two thousand, four hundred three".