21411040420 has 48 divisors (see below), whose sum is σ = 56058000768. Its totient is φ = 6673570560.

The previous prime is 21411040381. The next prime is 21411040433. The reversal of 21411040420 is 2404011412.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6950097 + ... + 6953176.

It is an arithmetic number, because the mean of its divisors is an integer number (1167875016).

Almost surely, 2^21411040420 is an apocalyptic number.

21411040420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21411040420 is an abundant number, since it is smaller than the sum of its proper divisors (34646960348).

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

21411040420 is a wasteful number, since it uses less digits than its factorization.

21411040420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13903300 (or 13903298 counting only the distinct ones).

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

Adding to 21411040420 its reverse (2404011412), we get a palindrome (23815051832).

The spelling of 21411040420 in words is "twenty-one billion, four hundred eleven million, forty thousand, four hundred twenty".