20306545506 has 96 divisors (see below), whose sum is σ = 49349917440. Its totient is φ = 6186024000.

The previous prime is 20306545487. The next prime is 20306545513. The reversal of 20306545506 is 60554560302.

It is a happy number.

20306545506 is a `hidden beast` number, since 20 + 30 + 6 + 54 + 550 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 910711 + ... + 932741.

It is an arithmetic number, because the mean of its divisors is an integer number (514061640).

Almost surely, 2^20306545506 is an apocalyptic number.

20306545506 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 20306545506, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24674958720).

20306545506 is an abundant number, since it is smaller than the sum of its proper divisors (29043371934).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20306545506 is a wasteful number, since it uses less digits than its factorization.

20306545506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22169 (or 22150 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 36.

The spelling of 20306545506 in words is "twenty billion, three hundred six million, five hundred forty-five thousand, five hundred six".