20402037073 has 4 divisors (see below), whose sum is σ = 22256767728. Its totient is φ = 18547306420.

The previous prime is 20402037043. The next prime is 20402037079. The reversal of 20402037073 is 37073020402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20402037073 - 2⁵ = 20402037041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20402037079) 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, 927365311 + ... + 927365332.

It is an arithmetic number, because the mean of its divisors is an integer number (5564191932).

Almost surely, 2^20402037073 is an apocalyptic number.

It is an amenable number.

20402037073 is a deficient number, since it is larger than the sum of its proper divisors (1854730655).

20402037073 is a wasteful number, since it uses less digits than its factorization.

20402037073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1854730654.

The product of its (nonzero) digits is 7056, while the sum is 28.

Adding to 20402037073 its reverse (37073020402), we get a palindrome (57475057475).

It can be divided in two parts, 2040203 and 7073, that added together give a triangular number (2047276 = T₂₀₂₃).

The spelling of 20402037073 in words is "twenty billion, four hundred two million, thirty-seven thousand, seventy-three".