20077132770 has 128 divisors (see below), whose sum is σ = 58220985600. Its totient is φ = 4902736896.

The previous prime is 20077132769. The next prime is 20077132853. The reversal of 20077132770 is 7723177002.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 110721 + ... + 228939.

It is an arithmetic number, because the mean of its divisors is an integer number (454851450).

Almost surely, 2^20077132770 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20077132770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29110492800).

20077132770 is an abundant number, since it is smaller than the sum of its proper divisors (38143852830).

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

20077132770 is a wasteful number, since it uses less digits than its factorization.

20077132770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118289 (or 118283 counting only the distinct ones).

The product of its (nonzero) digits is 28812, while the sum is 36.

The spelling of 20077132770 in words is "twenty billion, seventy-seven million, one hundred thirty-two thousand, seven hundred seventy".