20351667037 has 4 divisors (see below), whose sum is σ = 21917179900. Its totient is φ = 18786154176.

The previous prime is 20351667019. The next prime is 20351667131. The reversal of 20351667037 is 73076615302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73076615302 = 2 ⋅36538307651.

It can be written as a sum of positive squares in 2 ways, for example, as 2334242596 + 18017424441 = 48314^2 + 134229^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20351667037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20351667437) 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, 782756412 + ... + 782756437.

It is an arithmetic number, because the mean of its divisors is an integer number (5479294975).

Almost surely, 2^20351667037 is an apocalyptic number.

It is an amenable number.

20351667037 is a deficient number, since it is larger than the sum of its proper divisors (1565512863).

20351667037 is a wasteful number, since it uses less digits than its factorization.

20351667037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1565512862.

The product of its (nonzero) digits is 158760, while the sum is 40.

The spelling of 20351667037 in words is "twenty billion, three hundred fifty-one million, six hundred sixty-seven thousand, thirty-seven".