20540381074 has 4 divisors (see below), whose sum is σ = 30810571614. Its totient is φ = 10270190536.

The previous prime is 20540381051. The next prime is 20540381101. The reversal of 20540381074 is 47018304502.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 10793755449 + 9746625625 = 103893^2 + 98725^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5135095267 + ... + 5135095270.

Almost surely, 2^20540381074 is an apocalyptic number.

20540381074 is a deficient number, since it is larger than the sum of its proper divisors (10270190540).

20540381074 is a wasteful number, since it uses less digits than its factorization.

20540381074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10270190539.

The product of its (nonzero) digits is 26880, while the sum is 34.

Adding to 20540381074 its reverse (47018304502), we get a palindrome (67558685576).

The spelling of 20540381074 in words is "twenty billion, five hundred forty million, three hundred eighty-one thousand, seventy-four".