20306156551 has 8 divisors (see below), whose sum is σ = 20887751808. Its totient is φ = 19728672000.

The previous prime is 20306156543. The next prime is 20306156567. The reversal of 20306156551 is 15565160302.

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 20306156551 - 2³ = 20306156543 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 (20306156531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1017655 + ... + 1037416.

It is an arithmetic number, because the mean of its divisors is an integer number (2610968976).

Almost surely, 2^20306156551 is an apocalyptic number.

20306156551 is a deficient number, since it is larger than the sum of its proper divisors (581595257).

20306156551 is a wasteful number, since it uses less digits than its factorization.

20306156551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2055353.

The product of its (nonzero) digits is 27000, while the sum is 34.

The spelling of 20306156551 in words is "twenty billion, three hundred six million, one hundred fifty-six thousand, five hundred fifty-one".