20111214440 has 32 divisors (see below), whose sum is σ = 45992045160. Its totient is φ = 7912608000.

The previous prime is 20111214391. The next prime is 20111214463. The reversal of 20111214440 is 4441211102.

It can be written as a sum of positive squares in 4 ways, for example, as 10856389636 + 9254824804 = 104194^2 + 96202^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 4118711 + ... + 4123590.

Almost surely, 2^20111214440 is an apocalyptic number.

20111214440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20111214440 is an abundant number, since it is smaller than the sum of its proper divisors (25880830720).

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

20111214440 is a wasteful number, since it uses less digits than its factorization.

20111214440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8242373 (or 8242369 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 20111214440 its reverse (4441211102), we get a palindrome (24552425542).

The spelling of 20111214440 in words is "twenty billion, one hundred eleven million, two hundred fourteen thousand, four hundred forty".