20406769355 has 16 divisors (see below), whose sum is σ = 28086035904. Its totient is φ = 13943408640.

The previous prime is 20406769351. The next prime is 20406769379. The reversal of 20406769355 is 55396760402.

It is not a de Polignac number, because 20406769355 - 2² = 20406769351 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20406769351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1027622 + ... + 1047291.

It is an arithmetic number, because the mean of its divisors is an integer number (1755377244).

Almost surely, 2^20406769355 is an apocalyptic number.

20406769355 is a deficient number, since it is larger than the sum of its proper divisors (7679266549).

20406769355 is a wasteful number, since it uses less digits than its factorization.

20406769355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2075206.

The product of its (nonzero) digits is 1360800, while the sum is 47.

The spelling of 20406769355 in words is "twenty billion, four hundred six million, seven hundred sixty-nine thousand, three hundred fifty-five".