20387655226 has 8 divisors (see below), whose sum is σ = 31636016820. Its totient is φ = 9842316288.

The previous prime is 20387655217. The next prime is 20387655247. The reversal of 20387655226 is 62255678302.

It can be written as a sum of positive squares in 2 ways, for example, as 18847171225 + 1540484001 = 137285^2 + 39249^2 .

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

It is a super-2 number, since 2×20387655226² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175755591 + ... + 175755706.

Almost surely, 2^20387655226 is an apocalyptic number.

20387655226 is a deficient number, since it is larger than the sum of its proper divisors (11248361594).

20387655226 is a wasteful number, since it uses less digits than its factorization.

20387655226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351511328.

The product of its (nonzero) digits is 1209600, while the sum is 46.

The spelling of 20387655226 in words is "twenty billion, three hundred eighty-seven million, six hundred fifty-five thousand, two hundred twenty-six".