25213421434 has 16 divisors (see below), whose sum is σ = 39355604640. Its totient is φ = 12104825040.

The previous prime is 25213421383. The next prime is 25213421447. The reversal of 25213421434 is 43412431252.

It is a junction number, because it is equal to n+sod(n) for n = 25213421396 and 25213421405.

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, 2479497 + ... + 2489644.

It is an arithmetic number, because the mean of its divisors is an integer number (2459725290).

Almost surely, 2^25213421434 is an apocalyptic number.

25213421434 is a deficient number, since it is larger than the sum of its proper divisors (14142183206).

25213421434 is a wasteful number, since it uses less digits than its factorization.

25213421434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4969245.

The product of its digits is 23040, while the sum is 31.

Adding to 25213421434 its reverse (43412431252), we get a palindrome (68625852686).

The spelling of 25213421434 in words is "twenty-five billion, two hundred thirteen million, four hundred twenty-one thousand, four hundred thirty-four".