20012319492 has 96 divisors (see below), whose sum is σ = 51544356864. Its totient is φ = 5992704000.

The previous prime is 20012319491. The next prime is 20012319541. The reversal of 20012319492 is 29491321002.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (20012319491) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7843617 + ... + 7846167.

It is an arithmetic number, because the mean of its divisors is an integer number (536920384).

Almost surely, 2^20012319492 is an apocalyptic number.

20012319492 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20012319492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25772178432).

20012319492 is an abundant number, since it is smaller than the sum of its proper divisors (31532037372).

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

20012319492 is a wasteful number, since it uses less digits than its factorization.

20012319492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3249 (or 3247 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The spelling of 20012319492 in words is "twenty billion, twelve million, three hundred nineteen thousand, four hundred ninety-two".