21962963 has 16 divisors (see below), whose sum is σ = 25523424. Its totient is φ = 18677760.

The previous prime is 21962933. The next prime is 21963001. The reversal of 21962963 is 36926912.

It is a cyclic number.

It is not a de Polignac number, because 21962963 - 2²² = 17768659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21962923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47831 + ... + 48287.

It is an arithmetic number, because the mean of its divisors is an integer number (1595214).

Almost surely, 2^21962963 is an apocalyptic number.

21962963 is a deficient number, since it is larger than the sum of its proper divisors (3560461).

21962963 is a wasteful number, since it uses less digits than its factorization.

21962963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742.

The product of its digits is 34992, while the sum is 38.

The square root of 21962963 is about 4686.4659392766. The cubic root of 21962963 is about 280.0466036373.

The spelling of 21962963 in words is "twenty-one million, nine hundred sixty-two thousand, nine hundred sixty-three".