21420403141 has 8 divisors (see below), whose sum is σ = 22573520480. Its totient is φ = 20269858608.

The previous prime is 21420403133. The next prime is 21420403159. The reversal of 21420403141 is 14130402412.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21420403141 - 2³ = 21420403133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21420403241) 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, 626091 + ... + 659416.

It is an arithmetic number, because the mean of its divisors is an integer number (2821690060).

Almost surely, 2^21420403141 is an apocalyptic number.

It is an amenable number.

21420403141 is a deficient number, since it is larger than the sum of its proper divisors (1153117339).

21420403141 is a wasteful number, since it uses less digits than its factorization.

21420403141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1286403.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 21420403141 its reverse (14130402412), we get a palindrome (35550805553).

The spelling of 21420403141 in words is "twenty-one billion, four hundred twenty million, four hundred three thousand, one hundred forty-one".