20129202393870 has 32 divisors (see below), whose sum is σ = 49128900762240. Its totient is φ = 5276807858720.

The previous prime is 20129202393863. The next prime is 20129202393967. The reversal of 20129202393870 is 7839320292102.

It is a happy number.

It is a super-2 number, since 2×20129202393870² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 5686213596 + ... + 5686217135.

It is an arithmetic number, because the mean of its divisors is an integer number (1535278148820).

Almost surely, 2^{20129202393870} is an apocalyptic number.

20129202393870 is an abundant number, since it is smaller than the sum of its proper divisors (28999698368370).

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

20129202393870 is a wasteful number, since it uses less digits than its factorization.

20129202393870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11372430800.

The product of its (nonzero) digits is 653184, while the sum is 48.

The spelling of 20129202393870 in words is "twenty trillion, one hundred twenty-nine billion, two hundred two million, three hundred ninety-three thousand, eight hundred seventy".