20695722450 has 384 divisors, whose sum is σ = 61809377280. Its totient is φ = 4534963200.

The previous prime is 20695722449. The next prime is 20695722457. The reversal of 20695722450 is 5422759602.

It is not an unprimeable number, because it can be changed into a prime (20695722457) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 42496107 + ... + 42496593.

It is an arithmetic number, because the mean of its divisors is an integer number (160961920).

Almost surely, 2^20695722450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20695722450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30904688640).

20695722450 is an abundant number, since it is smaller than the sum of its proper divisors (41113654830).

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

20695722450 is a wasteful number, since it uses less digits than its factorization.

20695722450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602 (or 597 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 42.

The spelling of 20695722450 in words is "twenty billion, six hundred ninety-five million, seven hundred twenty-two thousand, four hundred fifty".