20355001261010 has 16 divisors (see below), whose sum is σ = 39457387060056. Its totient is φ = 7515692773248.

The previous prime is 20355001260953. The next prime is 20355001261019. The reversal of 20355001261010 is 1016210055302.

It can be written as a sum of positive squares in 4 ways, for example, as 17835730758169 + 2519270502841 = 4223237^2 + 1587221^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (20355001261019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78288466259 + ... + 78288466518.

Almost surely, 2^{20355001261010} is an apocalyptic number.

20355001261010 is a deficient number, since it is larger than the sum of its proper divisors (19102385799046).

20355001261010 is a wasteful number, since it uses less digits than its factorization.

20355001261010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156576932797.

The product of its (nonzero) digits is 1800, while the sum is 26.

The spelling of 20355001261010 in words is "twenty trillion, three hundred fifty-five billion, one million, two hundred sixty-one thousand, ten".