20612151506 has 8 divisors (see below), whose sum is σ = 30973737420. Its totient is φ = 10287572368.

The previous prime is 20612151487. The next prime is 20612151529. The reversal of 20612151506 is 60515121602.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20487628225 + 124523281 = 143135^2 + 11159^2 .

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, 9250301 + ... + 9252528.

Almost surely, 2^20612151506 is an apocalyptic number.

20612151506 is a deficient number, since it is larger than the sum of its proper divisors (10361585914).

20612151506 is a wasteful number, since it uses less digits than its factorization.

20612151506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18503388.

The product of its (nonzero) digits is 3600, while the sum is 29.

The spelling of 20612151506 in words is "twenty billion, six hundred twelve million, one hundred fifty-one thousand, five hundred six".