21412030140 has 36 divisors (see below), whose sum is σ = 64949825304. Its totient is φ = 5709874656.

The previous prime is 21412030121. The next prime is 21412030147. The reversal of 21412030140 is 4103021412.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21412030147) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59477682 + ... + 59478041.

It is an arithmetic number, because the mean of its divisors is an integer number (1804161814).

Almost surely, 2^21412030140 is an apocalyptic number.

21412030140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21412030140 is an abundant number, since it is smaller than the sum of its proper divisors (43537795164).

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

21412030140 is a wasteful number, since it uses less digits than its factorization.

21412030140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118955738 (or 118955733 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21412030140 its reverse (4103021412), we get a palindrome (25515051552).

The spelling of 21412030140 in words is "twenty-one billion, four hundred twelve million, thirty thousand, one hundred forty".