21710426262 has 64 divisors (see below), whose sum is σ = 50818420224. Its totient is φ = 6053886720.

The previous prime is 21710426239. The next prime is 21710426267. The reversal of 21710426262 is 26262401712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21710426267) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2670628 + ... + 2678744.

It is an arithmetic number, because the mean of its divisors is an integer number (794037816).

Almost surely, 2^21710426262 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21710426262, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25409210112).

21710426262 is an abundant number, since it is smaller than the sum of its proper divisors (29107993962).

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

21710426262 is a wasteful number, since it uses less digits than its factorization.

21710426262 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9653.

The product of its (nonzero) digits is 16128, while the sum is 33.

Adding to 21710426262 its reverse (26262401712), we get a palindrome (47972827974).

The spelling of 21710426262 in words is "twenty-one billion, seven hundred ten million, four hundred twenty-six thousand, two hundred sixty-two".