21923950 has 12 divisors (see below), whose sum is σ = 40778640. Its totient is φ = 8769560.

The previous prime is 21923947. The next prime is 21923953. The reversal of 21923950 is 5932912.

It is an interprime number because it is at equal distance from previous prime (21923947) and next prime (21923953).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21923953) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 219190 + ... + 219289.

It is an arithmetic number, because the mean of its divisors is an integer number (3398220).

Almost surely, 2^21923950 is an apocalyptic number.

21923950 is a deficient number, since it is larger than the sum of its proper divisors (18854690).

21923950 is a wasteful number, since it uses less digits than its factorization.

21923950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438491 (or 438486 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 21923950 is about 4682.3017843791. The cubic root of 21923950 is about 279.8806889634.

The spelling of 21923950 in words is "twenty-one million, nine hundred twenty-three thousand, nine hundred fifty".