20038745077 has 8 divisors (see below), whose sum is σ = 21581300664. Its totient is φ = 18496348608.

The previous prime is 20038745063. The next prime is 20038745099. The reversal of 20038745077 is 77054783002.

It can be written as a sum of positive squares in 4 ways, for example, as 5347850641 + 14690894436 = 73129^2 + 121206^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20038745077 - 2¹¹ = 20038743029 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 (20038745057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 411303 + ... + 457435.

It is an arithmetic number, because the mean of its divisors is an integer number (2697662583).

Almost surely, 2^20038745077 is an apocalyptic number.

It is an amenable number.

20038745077 is a deficient number, since it is larger than the sum of its proper divisors (1542555587).

20038745077 is a wasteful number, since it uses less digits than its factorization.

20038745077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79559.

The product of its (nonzero) digits is 329280, while the sum is 43.

The spelling of 20038745077 in words is "twenty billion, thirty-eight million, seven hundred forty-five thousand, seventy-seven".