20806533462 has 96 divisors (see below), whose sum is σ = 49324826880. Its totient is φ = 5812171200.

The previous prime is 20806533421. The next prime is 20806533467. The reversal of 20806533462 is 26433560802.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 20806533462.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20806533467) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13769287 + ... + 13770797.

It is an arithmetic number, because the mean of its divisors is an integer number (513800280).

Almost surely, 2^20806533462 is an apocalyptic number.

20806533462 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 20806533462, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24662413440).

20806533462 is an abundant number, since it is smaller than the sum of its proper divisors (28518293418).

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

20806533462 is a wasteful number, since it uses less digits than its factorization.

20806533462 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3010 (or 2999 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 39.

The spelling of 20806533462 in words is "twenty billion, eight hundred six million, five hundred thirty-three thousand, four hundred sixty-two".