20945400021453 has 8 divisors (see below), whose sum is σ = 28043080527616. Its totient is φ = 13905659764800.

The previous prime is 20945400021433. The next prime is 20945400021463. The reversal of 20945400021453 is 35412000454902.

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

It is not a de Polignac number, because 20945400021453 - 2⁵ = 20945400021421 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20945400021433) 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, 14485061533 + ... + 14485062978.

It is an arithmetic number, because the mean of its divisors is an integer number (3505385065952).

Almost surely, 2^{20945400021453} is an apocalyptic number.

It is an amenable number.

20945400021453 is a deficient number, since it is larger than the sum of its proper divisors (7097680506163).

20945400021453 is a wasteful number, since it uses less digits than its factorization.

20945400021453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28970124755.

The product of its (nonzero) digits is 172800, while the sum is 39.

The spelling of 20945400021453 in words is "twenty trillion, nine hundred forty-five billion, four hundred million, twenty-one thousand, four hundred fifty-three".