21214674240 has 224 divisors, whose sum is σ = 68299096320. Its totient is φ = 5578653696.

The previous prime is 21214674227. The next prime is 21214674241. The reversal of 21214674240 is 4247641212.

It is a super-3 number, since 3×21214674240³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21214674241) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 29180757 + ... + 29181483.

It is an arithmetic number, because the mean of its divisors is an integer number (304906680).

Almost surely, 2^21214674240 is an apocalyptic number.

21214674240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21214674240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34149548160).

21214674240 is an abundant number, since it is smaller than the sum of its proper divisors (47084422080).

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

21214674240 is a wasteful number, since it uses less digits than its factorization.

21214674240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1129 (or 1119 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 33.

The spelling of 21214674240 in words is "twenty-one billion, two hundred fourteen million, six hundred seventy-four thousand, two hundred forty".