20870240641 has 8 divisors (see below), whose sum is σ = 21803995584. Its totient is φ = 19938681840.

The previous prime is 20870240603. The next prime is 20870240693. The reversal of 20870240641 is 14604207802.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20870240641 - 2⁷ = 20870240513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20870240597 and 20870240606.

It is not an unprimeable number, because it can be changed into a prime (20870240341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 529590 + ... + 567631.

It is an arithmetic number, because the mean of its divisors is an integer number (2725499448).

Almost surely, 2^20870240641 is an apocalyptic number.

It is an amenable number.

20870240641 is a deficient number, since it is larger than the sum of its proper divisors (933754943).

20870240641 is a wasteful number, since it uses less digits than its factorization.

20870240641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1098071.

The product of its (nonzero) digits is 21504, while the sum is 34.

The spelling of 20870240641 in words is "twenty billion, eight hundred seventy million, two hundred forty thousand, six hundred forty-one".