20746377 has 6 divisors (see below), whose sum is σ = 29967002. Its totient is φ = 13830912.

The previous prime is 20746367. The next prime is 20746379. The reversal of 20746377 is 77364702.

It can be written as a sum of positive squares in only one way, i.e., 19527561 + 1218816 = 4419^2 + 1104^2 .

It is not a de Polignac number, because 20746377 - 2⁷ = 20746249 is a prime.

It is a super-2 number, since 2×20746377² = 860824317252258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20746379) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1152568 + ... + 1152585.

Almost surely, 2^20746377 is an apocalyptic number.

It is an amenable number.

20746377 is a deficient number, since it is larger than the sum of its proper divisors (9220625).

20746377 is a wasteful number, since it uses less digits than its factorization.

20746377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2305159 (or 2305156 counting only the distinct ones).

The product of its (nonzero) digits is 49392, while the sum is 36.

The square root of 20746377 is about 4554.8190962979. The cubic root of 20746377 is about 274.7772388870. Note that the first 3 decimals are identical.

The spelling of 20746377 in words is "twenty million, seven hundred forty-six thousand, three hundred seventy-seven".