20377669 has 4 divisors (see below), whose sum is σ = 21945196. Its totient is φ = 18810144.

The previous prime is 20377667. The next prime is 20377673. The reversal of 20377669 is 96677302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14062500 + 6315169 = 3750^2 + 2513^2 .

It is a cyclic number.

It is not a de Polignac number, because 20377669 - 2¹ = 20377667 is a prime.

It is a super-2 number, since 2×20377669² = 830498787747122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20377661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 783744 + ... + 783769.

It is an arithmetic number, because the mean of its divisors is an integer number (5486299).

Almost surely, 2^20377669 is an apocalyptic number.

It is an amenable number.

20377669 is a deficient number, since it is larger than the sum of its proper divisors (1567527).

20377669 is a wasteful number, since it uses less digits than its factorization.

20377669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1567526.

The product of its (nonzero) digits is 95256, while the sum is 40.

The square root of 20377669 is about 4514.1631561121. The cubic root of 20377669 is about 273.1397040645.

The spelling of 20377669 in words is "twenty million, three hundred seventy-seven thousand, six hundred sixty-nine".