20938469376 has 416 divisors, whose sum is σ = 66429665280. Its totient is φ = 5795020800.

The previous prime is 20938469371. The next prime is 20938469393. The reversal of 20938469376 is 67396483902.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (20938469371) 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, 79613821 + ... + 79614083.

Almost surely, 2^20938469376 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 20938469376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33214832640).

20938469376 is an abundant number, since it is smaller than the sum of its proper divisors (45491195904).

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

20938469376 is a wasteful number, since it uses less digits than its factorization.

20938469376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351 (or 329 counting only the distinct ones).

The product of its (nonzero) digits is 11757312, while the sum is 57.

The spelling of 20938469376 in words is "twenty billion, nine hundred thirty-eight million, four hundred sixty-nine thousand, three hundred seventy-six".