20973453696 has 192 divisors, whose sum is σ = 68417622000. Its totient is φ = 6113636352.

The previous prime is 20973453667. The next prime is 20973453703. The reversal of 20973453696 is 69635437902.

20973453696 is a `hidden beast` number, since 209 + 7 + 345 + 3 + 6 + 96 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 247690 + ... + 321398.

Almost surely, 2^20973453696 is an apocalyptic number.

20973453696 is a gapful number since it is divisible by the number (26) 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 20973453696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34208811000).

20973453696 is an abundant number, since it is smaller than the sum of its proper divisors (47444168304).

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

20973453696 is a wasteful number, since it uses less digits than its factorization.

20973453696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73761 (or 73746 counting only the distinct ones).

The product of its (nonzero) digits is 7348320, while the sum is 54.

The spelling of 20973453696 in words is "twenty billion, nine hundred seventy-three million, four hundred fifty-three thousand, six hundred ninety-six".