21140502 has 32 divisors (see below), whose sum is σ = 45601920. Its totient is φ = 6511680.

The previous prime is 21140501. The next prime is 21140513. The reversal of 21140502 is 20504112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21140501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2413 + ... + 6935.

It is an arithmetic number, because the mean of its divisors is an integer number (1425060).

Almost surely, 2^21140502 is an apocalyptic number.

21140502 is an abundant number, since it is smaller than the sum of its proper divisors (24461418).

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

21140502 is a wasteful number, since it uses less digits than its factorization.

21140502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4588.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 21140502 is about 4597.8801637276. The cubic root of 21140502 is about 276.5063431385.

Adding to 21140502 its reverse (20504112), we get a palindrome (41644614).

The spelling of 21140502 in words is "twenty-one million, one hundred forty thousand, five hundred two".