20011631776 has 24 divisors (see below), whose sum is σ = 39402363924. Its totient is φ = 10004682240.

The previous prime is 20011631737. The next prime is 20011631777. The reversal of 20011631776 is 67713611002.

It can be written as a sum of positive squares in 2 ways, for example, as 19915983376 + 95648400 = 141124^2 + 9780^2 .

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (20011631777) 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, 300396 + ... + 360916.

Almost surely, 2^20011631776 is an apocalyptic number.

It is an amenable number.

20011631776 is a deficient number, since it is larger than the sum of its proper divisors (19390732148).

20011631776 is a wasteful number, since it uses less digits than its factorization.

20011631776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70864 (or 70856 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 34.

The spelling of 20011631776 in words is "twenty billion, eleven million, six hundred thirty-one thousand, seven hundred seventy-six".