19850801061 has 48 divisors (see below), whose sum is σ = 34599083904. Its totient is φ = 10015479936.

The previous prime is 19850801041. The next prime is 19850801083. The reversal of 19850801061 is 16010805891.

It is not a de Polignac number, because 19850801061 - 2⁶ = 19850800997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19850801021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 181866 + ... + 269771.

It is an arithmetic number, because the mean of its divisors is an integer number (720814248).

Almost surely, 2^19850801061 is an apocalyptic number.

It is an amenable number.

19850801061 is a deficient number, since it is larger than the sum of its proper divisors (14748282843).

19850801061 is a wasteful number, since it uses less digits than its factorization.

19850801061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451690 (or 451683 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 39.

The spelling of 19850801061 in words is "nineteen billion, eight hundred fifty million, eight hundred one thousand, sixty-one".