20406633374 has 4 divisors (see below), whose sum is σ = 30609950064. Its totient is φ = 10203316686.

The previous prime is 20406633343. The next prime is 20406633389. The reversal of 20406633374 is 47333660402.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5101658342 + ... + 5101658345.

It is an arithmetic number, because the mean of its divisors is an integer number (7652487516).

Almost surely, 2^20406633374 is an apocalyptic number.

20406633374 is a deficient number, since it is larger than the sum of its proper divisors (10203316690).

20406633374 is a wasteful number, since it uses less digits than its factorization.

20406633374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10203316689.

The product of its (nonzero) digits is 217728, while the sum is 38.

The spelling of 20406633374 in words is "twenty billion, four hundred six million, six hundred thirty-three thousand, three hundred seventy-four".