20011261602 has 16 divisors (see below), whose sum is σ = 40435127712. Its totient is φ = 6601653120.

The previous prime is 20011261601. The next prime is 20011261657. The reversal of 20011261602 is 20616211002.

It is not an unprimeable number, because it can be changed into a prime (20011261601) 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, 17191224 + ... + 17192387.

It is an arithmetic number, because the mean of its divisors is an integer number (2527195482).

Almost surely, 2^20011261602 is an apocalyptic number.

20011261602 is an abundant number, since it is smaller than the sum of its proper divisors (20423866110).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20011261602 is a wasteful number, since it uses less digits than its factorization.

20011261602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34383713.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 20011261602 its reverse (20616211002), we get a palindrome (40627472604).

The spelling of 20011261602 in words is "twenty billion, eleven million, two hundred sixty-one thousand, six hundred two".