20145541145 has 16 divisors (see below), whose sum is σ = 25356284928. Its totient is φ = 15347211840.

The previous prime is 20145541121. The next prime is 20145541159. The reversal of 20145541145 is 54114554102.

It is a happy number.

It is not a de Polignac number, because 20145541145 - 2¹⁴ = 20145524761 is a prime.

It is a super-2 number, since 2×20145541145² (a number of 21 digits) contains 22 as substring.

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, 1149761 + ... + 1167150.

It is an arithmetic number, because the mean of its divisors is an integer number (1584767808).

Almost surely, 2^20145541145 is an apocalyptic number.

It is an amenable number.

20145541145 is a deficient number, since it is larger than the sum of its proper divisors (5210743783).

20145541145 is a wasteful number, since it uses less digits than its factorization.

20145541145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2317000.

The product of its (nonzero) digits is 16000, while the sum is 32.

The spelling of 20145541145 in words is "twenty billion, one hundred forty-five million, five hundred forty-one thousand, one hundred forty-five".