20565150151557 has 32 divisors (see below), whose sum is σ = 30891135510144. Its totient is φ = 12059870457600.

The previous prime is 20565150151547. The next prime is 20565150151577. The reversal of 20565150151557 is 75515105156502.

It is not a de Polignac number, because 20565150151557 - 2⁶ = 20565150151493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20565150151547) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46306278 + ... + 46748279.

It is an arithmetic number, because the mean of its divisors is an integer number (965347984692).

Almost surely, 2^{20565150151557} is an apocalyptic number.

It is an amenable number.

20565150151557 is a deficient number, since it is larger than the sum of its proper divisors (10325985358587).

20565150151557 is a wasteful number, since it uses less digits than its factorization.

20565150151557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93054789.

The product of its (nonzero) digits is 1312500, while the sum is 48.

The spelling of 20565150151557 in words is "twenty trillion, five hundred sixty-five billion, one hundred fifty million, one hundred fifty-one thousand, five hundred fifty-seven".