20411348840 has 16 divisors (see below), whose sum is σ = 45925534980. Its totient is φ = 8164539520.

The previous prime is 20411348807. The next prime is 20411348929. The reversal of 20411348840 is 4884311402.

It can be written as a sum of positive squares in 2 ways, for example, as 20367285796 + 44063044 = 142714^2 + 6638^2 .

It is a super-2 number, since 2×20411348840² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20411348840.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255141821 + ... + 255141900.

Almost surely, 2^20411348840 is an apocalyptic number.

20411348840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20411348840 is an abundant number, since it is smaller than the sum of its proper divisors (25514186140).

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

20411348840 is a wasteful number, since it uses less digits than its factorization.

20411348840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510283732 (or 510283728 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 35.

The spelling of 20411348840 in words is "twenty billion, four hundred eleven million, three hundred forty-eight thousand, eight hundred forty".