20401012612 has 6 divisors (see below), whose sum is σ = 35701772078. Its totient is φ = 10200506304.

The previous prime is 20401012591. The next prime is 20401012649. The reversal of 20401012612 is 21621010402.

It can be written as a sum of positive squares in only one way, i.e., 15064125696 + 5336886916 = 122736^2 + 73054^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20401012612.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2550126573 + ... + 2550126580.

Almost surely, 2^20401012612 is an apocalyptic number.

It is an amenable number.

20401012612 is a deficient number, since it is larger than the sum of its proper divisors (15300759466).

20401012612 is a wasteful number, since it uses less digits than its factorization.

20401012612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5100253157 (or 5100253155 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The spelling of 20401012612 in words is "twenty billion, four hundred one million, twelve thousand, six hundred twelve".