21960834 has 64 divisors (see below), whose sum is σ = 52641792. Its totient is φ = 5976000.

The previous prime is 21960833. The next prime is 21960847. The reversal of 21960834 is 43806912.

It is a junction number, because it is equal to n+sod(n) for n = 21960795 and 21960804.

It is not an unprimeable number, because it can be changed into a prime (21960833) 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, 131419 + ... + 131585.

It is an arithmetic number, because the mean of its divisors is an integer number (822528).

Almost surely, 2^21960834 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21960834, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26320896).

21960834 is an abundant number, since it is smaller than the sum of its proper divisors (30680958).

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

21960834 is a wasteful number, since it uses less digits than its factorization.

21960834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 21960834 is about 4686.2387903307. The cubic root of 21960834 is about 280.0375544867.

The spelling of 21960834 in words is "twenty-one million, nine hundred sixty thousand, eight hundred thirty-four".