20401738 has 24 divisors (see below), whose sum is σ = 35756100. Its totient is φ = 8705088.

The previous prime is 20401729. The next prime is 20401739. The reversal of 20401738 is 83710402.

It can be written as a sum of positive squares in 2 ways, for example, as 17114769 + 3286969 = 4137^2 + 1813^2 .

It is not an unprimeable number, because it can be changed into a prime (20401739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39828 + ... + 40336.

Almost surely, 2^20401738 is an apocalyptic number.

20401738 is a deficient number, since it is larger than the sum of its proper divisors (15354362).

20401738 is a wasteful number, since it uses less digits than its factorization.

20401738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934 (or 927 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 20401738 is about 4516.8283119906. The cubic root of 20401738 is about 273.2472010321.

The spelling of 20401738 in words is "twenty million, four hundred one thousand, seven hundred thirty-eight".