21050632 has 48 divisors (see below), whose sum is σ = 42999660. Its totient is φ = 9652608.

The previous prime is 21050629. The next prime is 21050677. The reversal of 21050632 is 23605012.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15319396 + 5731236 = 3914^2 + 2394^2 .

It is a Harshad number since it is a multiple of its sum of digits (19).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 106758 + ... + 106954.

Almost surely, 2^21050632 is an apocalyptic number.

It is an amenable number.

21050632 is an abundant number, since it is smaller than the sum of its proper divisors (21949028).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21050632 is a wasteful number, since it uses less digits than its factorization.

21050632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278 (or 255 counting only the distinct ones).

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

The square root of 21050632 is about 4588.0967731729. The cubic root of 21050632 is about 276.1139695948.

Adding to 21050632 its reverse (23605012), we get a palindrome (44655644).

The spelling of 21050632 in words is "twenty-one million, fifty thousand, six hundred thirty-two".