21623050 has 24 divisors (see below), whose sum is σ = 40792032. Its totient is φ = 8526000.

The previous prime is 21622999. The next prime is 21623057. The reversal of 21623050 is 5032612.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21623057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 505 + ... + 6595.

It is an arithmetic number, because the mean of its divisors is an integer number (1699668).

Almost surely, 2^21623050 is an apocalyptic number.

21623050 is a deficient number, since it is larger than the sum of its proper divisors (19168982).

21623050 is a wasteful number, since it uses less digits than its factorization.

21623050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6174 (or 6169 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 21623050 is about 4650.0591394089. The cubic root of 21623050 is about 278.5943583392.

Adding to 21623050 its reverse (5032612), we get a palindrome (26655662).

The spelling of 21623050 in words is "twenty-one million, six hundred twenty-three thousand, fifty".