20261920758 has 16 divisors (see below), whose sum is σ = 42656675520. Its totient is φ = 6398501256.

The previous prime is 20261920753. The next prime is 20261920769. The reversal of 20261920758 is 85702916202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20261920751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88867960 + ... + 88868187.

It is an arithmetic number, because the mean of its divisors is an integer number (2666042220).

Almost surely, 2^20261920758 is an apocalyptic number.

20261920758 is an abundant number, since it is smaller than the sum of its proper divisors (22394754762).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20261920758 is a wasteful number, since it uses less digits than its factorization.

20261920758 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177736171.

The product of its (nonzero) digits is 120960, while the sum is 42.

The spelling of 20261920758 in words is "twenty billion, two hundred sixty-one million, nine hundred twenty thousand, seven hundred fifty-eight".