20545705254 has 8 divisors (see below), whose sum is σ = 41091410520. Its totient is φ = 6848568416.

The previous prime is 20545705207. The next prime is 20545705261. The reversal of 20545705254 is 45250754502.

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

20545705254 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1712142099 + ... + 1712142110.

It is an arithmetic number, because the mean of its divisors is an integer number (5136426315).

Almost surely, 2^20545705254 is an apocalyptic number.

20545705254 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20545705254 is a wasteful number, since it uses less digits than its factorization.

20545705254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3424284214.

The product of its (nonzero) digits is 280000, while the sum is 39.

The spelling of 20545705254 in words is "twenty billion, five hundred forty-five million, seven hundred five thousand, two hundred fifty-four".