21622707 has 10 divisors (see below), whose sum is σ = 32300708. Its totient is φ = 14415084.

The previous prime is 21622693. The next prime is 21622723. The reversal of 21622707 is 70722612.

It is not a de Polignac number, because 21622707 - 2¹⁰ = 21621683 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21622607) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 133393 + ... + 133554.

Almost surely, 2^21622707 is an apocalyptic number.

21622707 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

21622707 is a deficient number, since it is larger than the sum of its proper divisors (10678001).

21622707 is an equidigital number, since it uses as much as digits as its factorization.

21622707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266959 (or 266950 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 21622707 is about 4650.0222580112. The cubic root of 21622707 is about 278.5928852450.

The spelling of 21622707 in words is "twenty-one million, six hundred twenty-two thousand, seven hundred seven".