20741561652170 has 8 divisors (see below), whose sum is σ = 37334810973924. Its totient is φ = 8296624660864.

The previous prime is 20741561652137. The next prime is 20741561652187. The reversal of 20741561652170 is 7125616514702.

It can be written as a sum of positive squares in 2 ways, for example, as 20590530707041 + 151030945129 = 4537679^2 + 388627^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1037078082599 + ... + 1037078082618.

Almost surely, 2^{20741561652170} is an apocalyptic number.

20741561652170 is a deficient number, since it is larger than the sum of its proper divisors (16593249321754).

20741561652170 is a wasteful number, since it uses less digits than its factorization.

20741561652170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2074156165224.

The product of its (nonzero) digits is 705600, while the sum is 47.

The spelling of 20741561652170 in words is "twenty trillion, seven hundred forty-one billion, five hundred sixty-one million, six hundred fifty-two thousand, one hundred seventy".