20423445332225 has 24 divisors (see below), whose sum is σ = 27487903994880. Its totient is φ = 14963173485120.

The previous prime is 20423445332203. The next prime is 20423445332231. The reversal of 20423445332225 is 52223354432402.

It is not a de Polignac number, because 20423445332225 - 2¹⁸ = 20423445070081 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 247365695 + ... + 247448244.

It is an arithmetic number, because the mean of its divisors is an integer number (1145329333120).

Almost surely, 2^{20423445332225} is an apocalyptic number.

20423445332225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20423445332225 is a deficient number, since it is larger than the sum of its proper divisors (7064458662655).

20423445332225 is a wasteful number, since it uses less digits than its factorization.

20423445332225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494814089 (or 494814084 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 41.

Adding to 20423445332225 its reverse (52223354432402), we get a palindrome (72646799764627).

The spelling of 20423445332225 in words is "twenty trillion, four hundred twenty-three billion, four hundred forty-five million, three hundred thirty-two thousand, two hundred twenty-five".