21040150240 has 48 divisors (see below), whose sum is σ = 49716307872. Its totient is φ = 8414544384.

The previous prime is 21040150223. The next prime is 21040150253. The reversal of 21040150240 is 4205104012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1414522 + ... + 1429318.

It is an arithmetic number, because the mean of its divisors is an integer number (1035756414).

Almost surely, 2^21040150240 is an apocalyptic number.

21040150240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21040150240 is an abundant number, since it is smaller than the sum of its proper divisors (28676157632).

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

21040150240 is a wasteful number, since it uses less digits than its factorization.

21040150240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23699 (or 23691 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

Adding to 21040150240 its reverse (4205104012), we get a palindrome (25245254252).

The spelling of 21040150240 in words is "twenty-one billion, forty million, one hundred fifty thousand, two hundred forty".