20477356 has 12 divisors (see below), whose sum is σ = 35970480. Its totient is φ = 10200080.

The previous prime is 20477351. The next prime is 20477357. The reversal of 20477356 is 65377402.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20477351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8440 + ... + 10591.

It is an arithmetic number, because the mean of its divisors is an integer number (2997540).

Almost surely, 2^20477356 is an apocalyptic number.

It is an amenable number.

20477356 is a deficient number, since it is larger than the sum of its proper divisors (15493124).

20477356 is a wasteful number, since it uses less digits than its factorization.

20477356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19304 (or 19302 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 34.

The square root of 20477356 is about 4525.1912666759. The cubic root of 20477356 is about 273.5843770647.

The spelling of 20477356 in words is "twenty million, four hundred seventy-seven thousand, three hundred fifty-six".