20770167642 has 32 divisors (see below), whose sum is σ = 49973337600. Its totient is φ = 5622000048.

The previous prime is 20770167563. The next prime is 20770167643. The reversal of 20770167642 is 24676107702.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 20770167594 and 20770167603.

It is not an unprimeable number, because it can be changed into a prime (20770167643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13013092 + ... + 13014687.

It is an arithmetic number, because the mean of its divisors is an integer number (1561666800).

Almost surely, 2^20770167642 is an apocalyptic number.

20770167642 is an abundant number, since it is smaller than the sum of its proper divisors (29203169958).

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

20770167642 is a wasteful number, since it uses less digits than its factorization.

20770167642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26027810.

The product of its (nonzero) digits is 197568, while the sum is 42.

The spelling of 20770167642 in words is "twenty billion, seven hundred seventy million, one hundred sixty-seven thousand, six hundred forty-two".