20477402 has 16 divisors (see below), whose sum is σ = 35272800. Its totient is φ = 8817840.

The previous prime is 20477381. The next prime is 20477407.

20477402 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (20477407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24077 + ... + 24912.

It is an arithmetic number, because the mean of its divisors is an integer number (2204550).

Almost surely, 2^20477402 is an apocalyptic number.

20477402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20477402 is a deficient number, since it is larger than the sum of its proper divisors (14795398).

20477402 is a wasteful number, since it uses less digits than its factorization.

20477402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49021.

The product of its (nonzero) digits is 3136, while the sum is 26.

The square root of 20477402 is about 4525.1963493312. The cubic root of 20477402 is about 273.5845819230.

It can be divided in two parts, 2047 and 7402, that added together give a palindrome (9449).

The spelling of 20477402 in words is "twenty million, four hundred seventy-seven thousand, four hundred two".