21422420403 has 8 divisors (see below), whose sum is σ = 28825275600. Its totient is φ = 14150589408.

The previous prime is 21422420353. The next prime is 21422420429. The reversal of 21422420403 is 30402422412.

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

It is not a de Polignac number, because 21422420403 - 2¹² = 21422416307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21422420483) 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, 32755668 + ... + 32756321.

It is an arithmetic number, because the mean of its divisors is an integer number (3603159450).

Almost surely, 2^21422420403 is an apocalyptic number.

21422420403 is a deficient number, since it is larger than the sum of its proper divisors (7402855197).

21422420403 is a wasteful number, since it uses less digits than its factorization.

21422420403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65512101.

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 21422420403 its reverse (30402422412), we get a palindrome (51824842815).

The spelling of 21422420403 in words is "twenty-one billion, four hundred twenty-two million, four hundred twenty thousand, four hundred three".