20078201533172 has 24 divisors (see below), whose sum is σ = 35157189984000. Its totient is φ = 10033290905760.

The previous prime is 20078201533153. The next prime is 20078201533249. The reversal of 20078201533172 is 27133510287002.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109349522 + ... + 109532982.

It is an arithmetic number, because the mean of its divisors is an integer number (1464882916000).

Almost surely, 2^{20078201533172} is an apocalyptic number.

It is an amenable number.

20078201533172 is a deficient number, since it is larger than the sum of its proper divisors (15078988450828).

20078201533172 is a wasteful number, since it uses less digits than its factorization.

20078201533172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199151 (or 199149 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 41.

The spelling of 20078201533172 in words is "twenty trillion, seventy-eight billion, two hundred one million, five hundred thirty-three thousand, one hundred seventy-two".