20420429901 has 16 divisors (see below), whose sum is σ = 27279291264. Its totient is φ = 13587620544.

The previous prime is 20420429881. The next prime is 20420429929. The reversal of 20420429901 is 10992402402.

It is not a de Polignac number, because 20420429901 - 2¹⁰ = 20420428877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20420429101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6904315 + ... + 6907271.

It is an arithmetic number, because the mean of its divisors is an integer number (1704955704).

Almost surely, 2^20420429901 is an apocalyptic number.

It is an amenable number.

20420429901 is a deficient number, since it is larger than the sum of its proper divisors (6858861363).

20420429901 is a wasteful number, since it uses less digits than its factorization.

20420429901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6580.

The product of its (nonzero) digits is 10368, while the sum is 33.

The spelling of 20420429901 in words is "twenty billion, four hundred twenty million, four hundred twenty-nine thousand, nine hundred one".