21342462040 has 32 divisors (see below), whose sum is σ = 48030040080. Its totient is φ = 8535295872.

The previous prime is 21342462023. The next prime is 21342462079. The reversal of 21342462040 is 4026424312.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162802 + ... + 263038.

Almost surely, 2^21342462040 is an apocalyptic number.

21342462040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21342462040 is an abundant number, since it is smaller than the sum of its proper divisors (26687578040).

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

21342462040 is a wasteful number, since it uses less digits than its factorization.

21342462040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105571 (or 105567 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 21342462040 its reverse (4026424312), we get a palindrome (25368886352).

The spelling of 21342462040 in words is "twenty-one billion, three hundred forty-two million, four hundred sixty-two thousand, forty".