21345962 has 16 divisors (see below), whose sum is σ = 35590752. Its totient is φ = 9519120.

The previous prime is 21345959. The next prime is 21345967. The reversal of 21345962 is 26954312.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21345967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7988 + ... + 10319.

It is an arithmetic number, because the mean of its divisors is an integer number (2224422).

Almost surely, 2^21345962 is an apocalyptic number.

21345962 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21345962 is a deficient number, since it is larger than the sum of its proper divisors (14244790).

21345962 is a wasteful number, since it uses less digits than its factorization.

21345962 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18373.

The product of its digits is 12960, while the sum is 32.

The square root of 21345962 is about 4620.1690445264. The cubic root of 21345962 is about 277.3992253726.

The spelling of 21345962 in words is "twenty-one million, three hundred forty-five thousand, nine hundred sixty-two".