20770338528 has 72 divisors (see below), whose sum is σ = 62174385000. Its totient is φ = 6559052544.

The previous prime is 20770338521. The next prime is 20770338581. The reversal of 20770338528 is 82583307702.

20770338528 is a `hidden beast` number, since 20 + 7 + 70 + 3 + 38 + 528 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-4 number, since 4×20770338528⁴ (a number of 42 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20770338521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1892403 + ... + 1903346.

It is an arithmetic number, because the mean of its divisors is an integer number (863533125).

Almost surely, 2^20770338528 is an apocalyptic number.

It is an amenable number.

20770338528 is an abundant number, since it is smaller than the sum of its proper divisors (41404046472).

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

20770338528 is a wasteful number, since it uses less digits than its factorization.

20770338528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3795784 (or 3795773 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The spelling of 20770338528 in words is "twenty billion, seven hundred seventy million, three hundred thirty-eight thousand, five hundred twenty-eight".