20164758446 has 16 divisors (see below), whose sum is σ = 34570005120. Its totient is φ = 8641577400.

The previous prime is 20164758443. The next prime is 20164758469. The reversal of 20164758446 is 64485746102.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20164758446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20164758443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 426245 + ... + 471183.

It is an arithmetic number, because the mean of its divisors is an integer number (2160625320).

Almost surely, 2^20164758446 is an apocalyptic number.

20164758446 is a deficient number, since it is larger than the sum of its proper divisors (14405246674).

20164758446 is a wasteful number, since it uses less digits than its factorization.

20164758446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76999.

The product of its (nonzero) digits is 1290240, while the sum is 47.

It can be divided in two parts, 2016 and 4758446, that multiplied together give a square (9593027136 = 97944²).

The spelling of 20164758446 in words is "twenty billion, one hundred sixty-four million, seven hundred fifty-eight thousand, four hundred forty-six".