20454145111 has 8 divisors (see below), whose sum is σ = 21345730560. Its totient is φ = 19562749272.

The previous prime is 20454145027. The next prime is 20454145133. The reversal of 20454145111 is 11154145402.

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 20454145111 - 2¹⁹ = 20453620823 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20454145111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20454145711) 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, 200746 + ... + 284968.

It is an arithmetic number, because the mean of its divisors is an integer number (2668216320).

Almost surely, 2^20454145111 is an apocalyptic number.

20454145111 is a deficient number, since it is larger than the sum of its proper divisors (891585449).

20454145111 is a wasteful number, since it uses less digits than its factorization.

20454145111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94805.

The product of its (nonzero) digits is 3200, while the sum is 28.

The spelling of 20454145111 in words is "twenty billion, four hundred fifty-four million, one hundred forty-five thousand, one hundred eleven".