20854814740 has 24 divisors (see below), whose sum is σ = 43986365640. Its totient is φ = 8305496448.

The previous prime is 20854814711. The next prime is 20854814767. The reversal of 20854814740 is 4741845802.

It can be written as a sum of positive squares in 4 ways, for example, as 6676197264 + 14178617476 = 81708^2 + 119074^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2272147 + ... + 2281306.

It is an arithmetic number, because the mean of its divisors is an integer number (1832765235).

Almost surely, 2^20854814740 is an apocalyptic number.

20854814740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20854814740 is an abundant number, since it is smaller than the sum of its proper divisors (23131550900).

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

20854814740 is a wasteful number, since it uses less digits than its factorization.

20854814740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4553691 (or 4553689 counting only the distinct ones).

The product of its (nonzero) digits is 286720, while the sum is 43.

The spelling of 20854814740 in words is "twenty billion, eight hundred fifty-four million, eight hundred fourteen thousand, seven hundred forty".