20540161545 has 8 divisors (see below), whose sum is σ = 32864258496. Its totient is φ = 10954752816.

The previous prime is 20540161531. The next prime is 20540161547. The reversal of 20540161545 is 54516104502.

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

It is not a de Polignac number, because 20540161545 - 2⁵ = 20540161513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20540161547) 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, 684672037 + ... + 684672066.

It is an arithmetic number, because the mean of its divisors is an integer number (4108032312).

Almost surely, 2^20540161545 is an apocalyptic number.

It is an amenable number.

20540161545 is a deficient number, since it is larger than the sum of its proper divisors (12324096951).

20540161545 is a wasteful number, since it uses less digits than its factorization.

20540161545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1369344111.

The product of its (nonzero) digits is 24000, while the sum is 33.

The spelling of 20540161545 in words is "twenty billion, five hundred forty million, one hundred sixty-one thousand, five hundred forty-five".