20021154325 has 12 divisors (see below), whose sum is σ = 24952258980. Its totient is φ = 15935615360.

The previous prime is 20021154253. The next prime is 20021154367. The reversal of 20021154325 is 52345112002.

It can be written as a sum of positive squares in 6 ways, for example, as 138462289 + 19882692036 = 11767^2 + 141006^2 .

It is a de Polignac number, because none of the positive numbers 2^k-20021154325 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 20021154325.

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, 2027680 + ... + 2037529.

It is an arithmetic number, because the mean of its divisors is an integer number (2079354915).

Almost surely, 2^20021154325 is an apocalyptic number.

20021154325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20021154325 is a deficient number, since it is larger than the sum of its proper divisors (4931104655).

20021154325 is a wasteful number, since it uses less digits than its factorization.

20021154325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4065416 (or 4065411 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 20021154325 its reverse (52345112002), we get a palindrome (72366266327).

The spelling of 20021154325 in words is "twenty billion, twenty-one million, one hundred fifty-four thousand, three hundred twenty-five".