20228181725 has 12 divisors (see below), whose sum is σ = 25132240020. Its totient is φ = 16150742400.

The previous prime is 20228181709. The next prime is 20228181751. The reversal of 20228181725 is 52718182202.

It can be written as a sum of positive squares in 6 ways, for example, as 65885689 + 20162296036 = 8117^2 + 141994^2 .

It is not a de Polignac number, because 20228181725 - 2⁴ = 20228181709 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 782096 + ... + 807545.

It is an arithmetic number, because the mean of its divisors is an integer number (2094353335).

Almost surely, 2^20228181725 is an apocalyptic number.

20228181725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20228181725 is a deficient number, since it is larger than the sum of its proper divisors (4904058295).

20228181725 is a wasteful number, since it uses less digits than its factorization.

20228181725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1590160 (or 1590155 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 38.

The spelling of 20228181725 in words is "twenty billion, two hundred twenty-eight million, one hundred eighty-one thousand, seven hundred twenty-five".