20013202546 has 4 divisors (see below), whose sum is σ = 30019803822. Its totient is φ = 10006601272.

The previous prime is 20013202541. The next prime is 20013202577. The reversal of 20013202546 is 64520231002.

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

It can be written as a sum of positive squares in only one way, i.e., 17918767321 + 2094435225 = 133861^2 + 45765^2 .

It is a super-2 number, since 2×20013202546² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20013202546.

It is not an unprimeable number, because it can be changed into a prime (20013202541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5003300635 + ... + 5003300638.

Almost surely, 2^20013202546 is an apocalyptic number.

20013202546 is a deficient number, since it is larger than the sum of its proper divisors (10006601276).

20013202546 is a wasteful number, since it uses less digits than its factorization.

20013202546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10006601275.

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 20013202546 its reverse (64520231002), we get a palindrome (84533433548).

The spelling of 20013202546 in words is "twenty billion, thirteen million, two hundred two thousand, five hundred forty-six".