20128001270 has 32 divisors (see below), whose sum is σ = 40713769152. Its totient is φ = 7108751232.

The previous prime is 20128001263. The next prime is 20128001303. The reversal of 20128001270 is 7210082102.

It is a super-2 number, since 2×20128001270² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3362897 + ... + 3368876.

It is an arithmetic number, because the mean of its divisors is an integer number (1272305286).

Almost surely, 2^20128001270 is an apocalyptic number.

20128001270 is an abundant number, since it is smaller than the sum of its proper divisors (20585767882).

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

20128001270 is a wasteful number, since it uses less digits than its factorization.

20128001270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6731816.

The product of its (nonzero) digits is 448, while the sum is 23.

Adding to 20128001270 its reverse (7210082102), we get a palindrome (27338083372).

The spelling of 20128001270 in words is "twenty billion, one hundred twenty-eight million, one thousand, two hundred seventy".