21254150240 has 48 divisors (see below), whose sum is σ = 50251440960. Its totient is φ = 8495139840.

The previous prime is 21254150213. The next prime is 21254150317. The reversal of 21254150240 is 4205145212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161081 + ... + 261639.

It is an arithmetic number, because the mean of its divisors is an integer number (1046905020).

Almost surely, 2^21254150240 is an apocalyptic number.

21254150240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21254150240 is an abundant number, since it is smaller than the sum of its proper divisors (28997290720).

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

21254150240 is a wasteful number, since it uses less digits than its factorization.

21254150240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101895 (or 101887 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 26.

Adding to 21254150240 its reverse (4205145212), we get a palindrome (25459295452).

The spelling of 21254150240 in words is "twenty-one billion, two hundred fifty-four million, one hundred fifty thousand, two hundred forty".