20153151563 has 4 divisors (see below), whose sum is σ = 21029375568. Its totient is φ = 19276927560.

The previous prime is 20153151541. The next prime is 20153151587. The reversal of 20153151563 is 36515135102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20153151563 - 2⁸ = 20153151307 is a prime.

It is a super-2 number, since 2×20153151563² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20153151533) 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, 438111968 + ... + 438112013.

It is an arithmetic number, because the mean of its divisors is an integer number (5257343892).

Almost surely, 2^20153151563 is an apocalyptic number.

20153151563 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20153151563 is a deficient number, since it is larger than the sum of its proper divisors (876224005).

20153151563 is an equidigital number, since it uses as much as digits as its factorization.

20153151563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876224004.

The product of its (nonzero) digits is 13500, while the sum is 32.

Adding to 20153151563 its reverse (36515135102), we get a palindrome (56668286665).

The spelling of 20153151563 in words is "twenty billion, one hundred fifty-three million, one hundred fifty-one thousand, five hundred sixty-three".