20733851964 has 96 divisors (see below), whose sum is σ = 57214080000. Its totient is φ = 5840439360.

The previous prime is 20733851953. The next prime is 20733851969. The reversal of 20733851964 is 46915833702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20733851969) 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, 256762 + ... + 327710.

It is an arithmetic number, because the mean of its divisors is an integer number (595980000).

It is a 1-persistent number, because it is pandigital, but 2⋅20733851964 = 41467703928 is not.

Almost surely, 2^20733851964 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 20733851964, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28607040000).

20733851964 is an abundant number, since it is smaller than the sum of its proper divisors (36480228036).

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

20733851964 is a wasteful number, since it uses less digits than its factorization.

20733851964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71048 (or 71032 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 48.

The spelling of 20733851964 in words is "twenty billion, seven hundred thirty-three million, eight hundred fifty-one thousand, nine hundred sixty-four".