20012555545 has 8 divisors (see below), whose sum is σ = 24016285440. Its totient is φ = 16009231920.

The previous prime is 20012555539. The next prime is 20012555557. The reversal of 20012555545 is 54555521002.

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

It is not a de Polignac number, because 20012555545 - 2⁵ = 20012555513 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20012555545.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20046 + ... + 201064.

It is an arithmetic number, because the mean of its divisors is an integer number (3002035680).

Almost surely, 2^20012555545 is an apocalyptic number.

It is an amenable number.

20012555545 is a deficient number, since it is larger than the sum of its proper divisors (4003729895).

20012555545 is a wasteful number, since it uses less digits than its factorization.

20012555545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203135.

The product of its (nonzero) digits is 50000, while the sum is 34.

The spelling of 20012555545 in words is "twenty billion, twelve million, five hundred fifty-five thousand, five hundred forty-five".