20825624454 has 32 divisors (see below), whose sum is σ = 42171615360. Its totient is φ = 6855220992.

The previous prime is 20825624441. The next prime is 20825624489. The reversal of 20825624454 is 45442652802.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1315317 + ... + 1331055.

It is an arithmetic number, because the mean of its divisors is an integer number (1317862980).

Almost surely, 2^20825624454 is an apocalyptic number.

20825624454 is an abundant number, since it is smaller than the sum of its proper divisors (21345990906).

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

20825624454 is a wasteful number, since it uses less digits than its factorization.

20825624454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18484.

The product of its (nonzero) digits is 614400, while the sum is 42.

The spelling of 20825624454 in words is "twenty billion, eight hundred twenty-five million, six hundred twenty-four thousand, four hundred fifty-four".