20261020635 has 24 divisors (see below), whose sum is σ = 35975669184. Its totient is φ = 10542318720.

The previous prime is 20261020621. The next prime is 20261020669. The reversal of 20261020635 is 53602016202.

20261020635 is a `hidden beast` number, since 2 + 0 + 2 + 6 + 1 + 0 + 20 + 635 = 666.

It is not a de Polignac number, because 20261020635 - 2⁸ = 20261020379 is a prime.

It is a super-3 number, since 3×20261020635³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20261020599 and 20261020608.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5488947 + ... + 5492636.

It is an arithmetic number, because the mean of its divisors is an integer number (1498986216).

Almost surely, 2^20261020635 is an apocalyptic number.

20261020635 is a deficient number, since it is larger than the sum of its proper divisors (15714648549).

20261020635 is a wasteful number, since it uses less digits than its factorization.

20261020635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10981635 (or 10981632 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 20261020635 its reverse (53602016202), we get a palindrome (73863036837).

The spelling of 20261020635 in words is "twenty billion, two hundred sixty-one million, twenty thousand, six hundred thirty-five".