20477018 has 16 divisors (see below), whose sum is σ = 31337280. Its totient is φ = 10033536.

The previous prime is 20476933. The next prime is 20477053. The reversal of 20477018 is 81077402.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21578 + ... + 22506.

It is an arithmetic number, because the mean of its divisors is an integer number (1958580).

Almost surely, 2^20477018 is an apocalyptic number.

20477018 is a deficient number, since it is larger than the sum of its proper divisors (10860262).

20477018 is a wasteful number, since it uses less digits than its factorization.

20477018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1141.

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 20477018 is about 4525.1539200341. The cubic root of 20477018 is about 273.5828717918.

The spelling of 20477018 in words is "twenty million, four hundred seventy-seven thousand, eighteen".