20261068451 has 6 divisors (see below), whose sum is σ = 21939500340. Its totient is φ = 18702524568.

The previous prime is 20261068423. The next prime is 20261068463. The reversal of 20261068451 is 15486016202.

It is not a de Polignac number, because 20261068451 - 2²² = 20256874147 is a prime.

It is a super-2 number, since 2×20261068451² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20261068481) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 59943821 + ... + 59944158.

It is an arithmetic number, because the mean of its divisors is an integer number (3656583390).

Almost surely, 2^20261068451 is an apocalyptic number.

20261068451 is a deficient number, since it is larger than the sum of its proper divisors (1678431889).

20261068451 is a wasteful number, since it uses less digits than its factorization.

20261068451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119888005 (or 119887992 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 35.

The spelling of 20261068451 in words is "twenty billion, two hundred sixty-one million, sixty-eight thousand, four hundred fifty-one".