20770858541 has 4 divisors (see below), whose sum is σ = 20790436284. Its totient is φ = 20751280800.

The previous prime is 20770858499. The next prime is 20770858547. The reversal of 20770858541 is 14585807702.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17995149316 + 2775709225 = 134146^2 + 52685^2 .

It is a cyclic number.

It is not a de Polignac number, because 20770858541 - 2³⁴ = 3590989357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20770858547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9787280 + ... + 9789401.

It is an arithmetic number, because the mean of its divisors is an integer number (5197609071).

Almost surely, 2^20770858541 is an apocalyptic number.

It is an amenable number.

20770858541 is a deficient number, since it is larger than the sum of its proper divisors (19577743).

20770858541 is a wasteful number, since it uses less digits than its factorization.

20770858541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19577742.

The product of its (nonzero) digits is 627200, while the sum is 47.

The spelling of 20770858541 in words is "twenty billion, seven hundred seventy million, eight hundred fifty-eight thousand, five hundred forty-one".