21534050 has 24 divisors (see below), whose sum is σ = 40176000. Its totient is φ = 8587280.

The previous prime is 21534047. The next prime is 21534067. The reversal of 21534050 is 5043512.

It is a Curzon number.

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, 29591 + ... + 30309.

It is an arithmetic number, because the mean of its divisors is an integer number (1674000).

Almost surely, 2^21534050 is an apocalyptic number.

21534050 is a deficient number, since it is larger than the sum of its proper divisors (18641950).

21534050 is a wasteful number, since it uses less digits than its factorization.

21534050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330 (or 1325 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 21534050 is about 4640.4795010861. The cubic root of 21534050 is about 278.2116032960.

Adding to 21534050 its reverse (5043512), we get a palindrome (26577562).

The spelling of 21534050 in words is "twenty-one million, five hundred thirty-four thousand, fifty".