21425214510 has 96 divisors (see below), whose sum is σ = 63710899200. Its totient is φ = 4893545664.

The previous prime is 21425214493. The next prime is 21425214527. The reversal of 21425214510 is 1541252412.

It is a happy number.

21425214510 is a `hidden beast` number, since 2 + 142 + 5 + 2 + 1 + 4 + 510 = 666.

It is an interprime number because it is at equal distance from previous prime (21425214493) and next prime (21425214527).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 884541 + ... + 908439.

It is an arithmetic number, because the mean of its divisors is an integer number (663655200).

Almost surely, 2^21425214510 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21425214510, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31855449600).

21425214510 is an abundant number, since it is smaller than the sum of its proper divisors (42285684690).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21425214510 is a wasteful number, since it uses less digits than its factorization.

21425214510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25342 (or 25339 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

Adding to 21425214510 its reverse (1541252412), we get a palindrome (22966466922).

The spelling of 21425214510 in words is "twenty-one billion, four hundred twenty-five million, two hundred fourteen thousand, five hundred ten".