20153275897 has 4 divisors (see below), whose sum is σ = 20154448720. Its totient is φ = 20152103076.

The previous prime is 20153275867. The next prime is 20153275913. The reversal of 20153275897 is 79857235102.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20153275897 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20153275897.

It is not an unprimeable number, because it can be changed into a prime (20153275867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 560247 + ... + 595132.

It is an arithmetic number, because the mean of its divisors is an integer number (5038612180).

Almost surely, 2^20153275897 is an apocalyptic number.

It is an amenable number.

20153275897 is a deficient number, since it is larger than the sum of its proper divisors (1172823).

20153275897 is a wasteful number, since it uses less digits than its factorization.

20153275897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1172822.

The product of its (nonzero) digits is 1058400, while the sum is 49.

The spelling of 20153275897 in words is "twenty billion, one hundred fifty-three million, two hundred seventy-five thousand, eight hundred ninety-seven".