21241431254 has 16 divisors (see below), whose sum is σ = 33567100080. Its totient is φ = 10053331200.

The previous prime is 21241431251. The next prime is 21241431259. The reversal of 21241431254 is 45213414212.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21241431251) 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, 187079 + ... + 278354.

It is an arithmetic number, because the mean of its divisors is an integer number (2097943755).

Almost surely, 2^21241431254 is an apocalyptic number.

21241431254 is a deficient number, since it is larger than the sum of its proper divisors (12325668826).

21241431254 is a wasteful number, since it uses less digits than its factorization.

21241431254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466655.

The product of its digits is 7680, while the sum is 29.

Adding to 21241431254 its reverse (45213414212), we get a palindrome (66454845466).

The spelling of 21241431254 in words is "twenty-one billion, two hundred forty-one million, four hundred thirty-one thousand, two hundred fifty-four".