20437673402 has 16 divisors (see below), whose sum is σ = 31027926312. Its totient is φ = 10095475200.

The previous prime is 20437673401. The next prime is 20437673413.

It is a happy number.

20437673402 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 19115551081 + 1322122321 = 138259^2 + 36361^2 .

It is not an unprimeable number, because it can be changed into a prime (20437673401) 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, 18383 + ... + 203010.

Almost surely, 2^20437673402 is an apocalyptic number.

20437673402 is a deficient number, since it is larger than the sum of its proper divisors (10590252910).

20437673402 is a wasteful number, since it uses less digits than its factorization.

20437673402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221953.

The product of its (nonzero) digits is 169344, while the sum is 38.

The spelling of 20437673402 in words is "twenty billion, four hundred thirty-seven million, six hundred seventy-three thousand, four hundred two".