20700432837 has 108 divisors (see below), whose sum is σ = 36805810860. Its totient is φ = 11176171776.

The previous prime is 20700432821. The next prime is 20700432853. The reversal of 20700432837 is 73823400702.

It is an interprime number because it is at equal distance from previous prime (20700432821) and next prime (20700432853).

It can be written as a sum of positive squares in 2 ways, for example, as 11086826436 + 9613606401 = 105294^2 + 98049^2 .

It is not a de Polignac number, because 20700432837 - 2⁴ = 20700432821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20700432817) by changing a digit.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 20762223 + ... + 20763219.

It is an arithmetic number, because the mean of its divisors is an integer number (340794545).

Almost surely, 2^20700432837 is an apocalyptic number.

It is an amenable number.

20700432837 is a deficient number, since it is larger than the sum of its proper divisors (16105378023).

20700432837 is a wasteful number, since it uses less digits than its factorization.

20700432837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1152 (or 1119 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 36.

The spelling of 20700432837 in words is "twenty billion, seven hundred million, four hundred thirty-two thousand, eight hundred thirty-seven".