20012269356 has 72 divisors (see below), whose sum is σ = 52295979008. Its totient is φ = 6445980000.

The previous prime is 20012269339. The next prime is 20012269367. The reversal of 20012269356 is 65396221002.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 20012269356.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 758181 + ... + 784131.

Almost surely, 2^20012269356 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20012269356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26147989504).

20012269356 is an abundant number, since it is smaller than the sum of its proper divisors (32283709652).

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

20012269356 is a wasteful number, since it uses less digits than its factorization.

20012269356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26683 (or 26678 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The spelling of 20012269356 in words is "twenty billion, twelve million, two hundred sixty-nine thousand, three hundred fifty-six".