20540044388 has 12 divisors (see below), whose sum is σ = 35946536892. Its totient is φ = 10269605280.

The previous prime is 20540044381. The next prime is 20540044417. The reversal of 20540044388 is 88344004502.

It can be written as a sum of positive squares in 2 ways, for example, as 12349432384 + 8190612004 = 111128^2 + 90502^2 .

It is a super-2 number, since 2×20540044388² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20540044381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24206 + ... + 204122.

It is an arithmetic number, because the mean of its divisors is an integer number (2995544741).

Almost surely, 2^20540044388 is an apocalyptic number.

It is an amenable number.

20540044388 is a deficient number, since it is larger than the sum of its proper divisors (15406492504).

20540044388 is a wasteful number, since it uses less digits than its factorization.

20540044388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208462 (or 208460 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 38.

The spelling of 20540044388 in words is "twenty billion, five hundred forty million, forty-four thousand, three hundred eighty-eight".