21354502 has 12 divisors (see below), whose sum is σ = 34685820. Its totient is φ = 9855768.

The previous prime is 21354451. The next prime is 21354551. The reversal of 21354502 is 20545312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31252 + ... + 31927.

It is an arithmetic number, because the mean of its divisors is an integer number (2890485).

Almost surely, 2^21354502 is an apocalyptic number.

21354502 is a deficient number, since it is larger than the sum of its proper divisors (13331318).

21354502 is a wasteful number, since it uses less digits than its factorization.

21354502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63207 (or 63194 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 21354502 is about 4621.0931607142. The cubic root of 21354502 is about 277.4362140004.

Adding to 21354502 its reverse (20545312), we get a palindrome (41899814).

The spelling of 21354502 in words is "twenty-one million, three hundred fifty-four thousand, five hundred two".