20154320545 has 16 divisors (see below), whose sum is σ = 24449967360. Its totient is φ = 15947319744.

The previous prime is 20154320489. The next prime is 20154320567. The reversal of 20154320545 is 54502345102.

It is a cyclic number.

It is not a de Polignac number, because 20154320545 - 2⁹ = 20154320033 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 403332 + ... + 450538.

It is an arithmetic number, because the mean of its divisors is an integer number (1528122960).

Almost surely, 2^20154320545 is an apocalyptic number.

It is an amenable number.

20154320545 is a deficient number, since it is larger than the sum of its proper divisors (4295646815).

20154320545 is a wasteful number, since it uses less digits than its factorization.

20154320545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48144.

The product of its (nonzero) digits is 24000, while the sum is 31.

Adding to 20154320545 its reverse (54502345102), we get a palindrome (74656665647).

The spelling of 20154320545 in words is "twenty billion, one hundred fifty-four million, three hundred twenty thousand, five hundred forty-five".