21401142040 has 32 divisors (see below), whose sum is σ = 48167325360. Its totient is φ = 8557833600.

The previous prime is 21401142001. The next prime is 21401142041. The reversal of 21401142040 is 4024110412.

It is a junction number, because it is equal to n+sod(n) for n = 21401141999 and 21401142017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21401142041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52930 + ... + 213550.

Almost surely, 2^21401142040 is an apocalyptic number.

21401142040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21401142040 is an abundant number, since it is smaller than the sum of its proper divisors (26766183320).

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

21401142040 is a wasteful number, since it uses less digits than its factorization.

21401142040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163963 (or 163959 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21401142040 its reverse (4024110412), we get a palindrome (25425252452).

The spelling of 21401142040 in words is "twenty-one billion, four hundred one million, one hundred forty-two thousand, forty".