20525204354 has 16 divisors (see below), whose sum is σ = 32628738168. Its totient is φ = 9650065152.

The previous prime is 20525204351. The next prime is 20525204407. The reversal of 20525204354 is 45340252502.

It can be written as a sum of positive squares in 4 ways, for example, as 18749003329 + 1776201025 = 136927^2 + 42145^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20525204354.

It is not an unprimeable number, because it can be changed into a prime (20525204351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 238997 + ... + 313320.

Almost surely, 2^20525204354 is an apocalyptic number.

20525204354 is a deficient number, since it is larger than the sum of its proper divisors (12103533814).

20525204354 is a wasteful number, since it uses less digits than its factorization.

20525204354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553429.

The product of its (nonzero) digits is 48000, while the sum is 32.

Adding to 20525204354 its reverse (45340252502), we get a palindrome (65865456856).

The spelling of 20525204354 in words is "twenty billion, five hundred twenty-five million, two hundred four thousand, three hundred fifty-four".