20606452642 has 8 divisors (see below), whose sum is σ = 30977316396. Its totient is φ = 10280680512.

The previous prime is 20606452637. The next prime is 20606452697. The reversal of 20606452642 is 24625460602.

It can be written as a sum of positive squares in 2 ways, for example, as 14263763761 + 6342688881 = 119431^2 + 79641^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11271763 + ... + 11273590.

Almost surely, 2^20606452642 is an apocalyptic number.

20606452642 is a deficient number, since it is larger than the sum of its proper divisors (10370863754).

20606452642 is a wasteful number, since it uses less digits than its factorization.

20606452642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22545812.

The product of its (nonzero) digits is 138240, while the sum is 37.

The spelling of 20606452642 in words is "twenty billion, six hundred six million, four hundred fifty-two thousand, six hundred forty-two".