20156571141 has 32 divisors (see below), whose sum is σ = 32079636480. Its totient is φ = 11016772416.

The previous prime is 20156571131. The next prime is 20156571151. The reversal of 20156571141 is 14117565102.

It is an interprime number because it is at equal distance from previous prime (20156571131) and next prime (20156571151).

It is not a de Polignac number, because 20156571141 - 2⁷ = 20156571013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20156571131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 174001 + ... + 265686.

It is an arithmetic number, because the mean of its divisors is an integer number (1002488640).

Almost surely, 2^20156571141 is an apocalyptic number.

20156571141 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20156571141 is a deficient number, since it is larger than the sum of its proper divisors (11923065339).

20156571141 is a wasteful number, since it uses less digits than its factorization.

20156571141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439793.

The product of its (nonzero) digits is 8400, while the sum is 33.

The spelling of 20156571141 in words is "twenty billion, one hundred fifty-six million, five hundred seventy-one thousand, one hundred forty-one".