20049967440 has 60 divisors (see below), whose sum is σ = 67334476404. Its totient is φ = 5346657792.

The previous prime is 20049967409. The next prime is 20049967453. The reversal of 20049967440 is 4476994002.

It can be written as a sum of positive squares in 2 ways, for example, as 14637128256 + 5412839184 = 120984^2 + 73572^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13922869 + ... + 13924308.

Almost surely, 2^20049967440 is an apocalyptic number.

20049967440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20049967440 is an abundant number, since it is smaller than the sum of its proper divisors (47284508964).

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

20049967440 is a wasteful number, since it uses less digits than its factorization.

20049967440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27847196 (or 27847187 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The spelling of 20049967440 in words is "twenty billion, forty-nine million, nine hundred sixty-seven thousand, four hundred forty".