20117621455250 has 192 divisors, whose sum is σ = 42197223100032. Its totient is φ = 7118623008000.

The previous prime is 20117621455247. The next prime is 20117621455277. The reversal of 20117621455250 is 5255412671102.

It is a junction number, because it is equal to n+sod(n) for n = 20117621455198 and 20117621455207.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 11882823404 + ... + 11882825096.

It is an arithmetic number, because the mean of its divisors is an integer number (219777203646).

Almost surely, 2^{20117621455250} is an apocalyptic number.

20117621455250 is an abundant number, since it is smaller than the sum of its proper divisors (22079601644782).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20117621455250 is a wasteful number, since it uses less digits than its factorization.

20117621455250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2398 (or 2071 counting only the distinct ones).

The product of its (nonzero) digits is 168000, while the sum is 41.

The spelling of 20117621455250 in words is "twenty trillion, one hundred seventeen billion, six hundred twenty-one million, four hundred fifty-five thousand, two hundred fifty".