20354584157 has 4 divisors (see below), whose sum is σ = 21425878080. Its totient is φ = 19283290236.

The previous prime is 20354584153. The next prime is 20354584207. The reversal of 20354584157 is 75148545302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75148545302 = 2 ⋅37574272651.

It is a cyclic number.

It is not a de Polignac number, because 20354584157 - 2² = 20354584153 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20354584153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 535646933 + ... + 535646970.

It is an arithmetic number, because the mean of its divisors is an integer number (5356469520).

Almost surely, 2^20354584157 is an apocalyptic number.

It is an amenable number.

20354584157 is a deficient number, since it is larger than the sum of its proper divisors (1071293923).

20354584157 is a wasteful number, since it uses less digits than its factorization.

20354584157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071293922.

The product of its (nonzero) digits is 672000, while the sum is 44.

The spelling of 20354584157 in words is "twenty billion, three hundred fifty-four million, five hundred eighty-four thousand, one hundred fifty-seven".