21415022140 has 12 divisors (see below), whose sum is σ = 44971546536. Its totient is φ = 8566008848.

The previous prime is 21415022119. The next prime is 21415022149. The reversal of 21415022140 is 4122051412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21415022149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 535375534 + ... + 535375573.

It is an arithmetic number, because the mean of its divisors is an integer number (3747628878).

Almost surely, 2^21415022140 is an apocalyptic number.

21415022140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21415022140 is an abundant number, since it is smaller than the sum of its proper divisors (23556524396).

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

21415022140 is a wasteful number, since it uses less digits than its factorization.

21415022140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1070751116 (or 1070751114 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

Adding to 21415022140 its reverse (4122051412), we get a palindrome (25537073552).

The spelling of 21415022140 in words is "twenty-one billion, four hundred fifteen million, twenty-two thousand, one hundred forty".