20306377553 has 8 divisors (see below), whose sum is σ = 25317042240. Its totient is φ = 15823151280.

The previous prime is 20306377529. The next prime is 20306377561. The reversal of 20306377553 is 35577360302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20306377553 - 2⁸ = 20306377297 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20306377553.

It is not an unprimeable number, because it can be changed into a prime (20306377253) 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 7 ways as a sum of consecutive naturals, for example, 131859518 + ... + 131859671.

It is an arithmetic number, because the mean of its divisors is an integer number (3164630280).

Almost surely, 2^20306377553 is an apocalyptic number.

It is an amenable number.

20306377553 is a deficient number, since it is larger than the sum of its proper divisors (5010664687).

20306377553 is a wasteful number, since it uses less digits than its factorization.

20306377553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263719207.

The product of its (nonzero) digits is 396900, while the sum is 41.

The spelling of 20306377553 in words is "twenty billion, three hundred six million, three hundred seventy-seven thousand, five hundred fifty-three".