21420440503160 has 32 divisors (see below), whose sum is σ = 48267181726560. Its totient is φ = 8555520095616.

The previous prime is 21420440503159. The next prime is 21420440503229. The reversal of 21420440503160 is 6130504402412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 395475884 + ... + 395530043.

It is an arithmetic number, because the mean of its divisors is an integer number (1508349428955).

Almost surely, 2^{21420440503160} is an apocalyptic number.

21420440503160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21420440503160 is an abundant number, since it is smaller than the sum of its proper divisors (26846741223400).

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

21420440503160 is a wasteful number, since it uses less digits than its factorization.

21420440503160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 791006615 (or 791006611 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

Adding to 21420440503160 its reverse (6130504402412), we get a palindrome (27550944905572).

The spelling of 21420440503160 in words is "twenty-one trillion, four hundred twenty billion, four hundred forty million, five hundred three thousand, one hundred sixty".