20264653787 has 12 divisors (see below), whose sum is σ = 23587404840. Its totient is φ = 17359213536.

The previous prime is 20264653763. The next prime is 20264653807. The reversal of 20264653787 is 78735646202.

It is not a de Polignac number, because 20264653787 - 2¹⁰ = 20264652763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20264653757) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42362 + ... + 205727.

It is an arithmetic number, because the mean of its divisors is an integer number (1965617070).

Almost surely, 2^20264653787 is an apocalyptic number.

20264653787 is a deficient number, since it is larger than the sum of its proper divisors (3322751053).

20264653787 is a wasteful number, since it uses less digits than its factorization.

20264653787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249770 (or 249763 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 50.

The spelling of 20264653787 in words is "twenty billion, two hundred sixty-four million, six hundred fifty-three thousand, seven hundred eighty-seven".