20621061372 has 24 divisors (see below), whose sum is σ = 48146716800. Its totient is φ = 6869271856.

The previous prime is 20621061359. The next prime is 20621061403. The reversal of 20621061372 is 27316012602.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 532422 + ... + 569837.

It is an arithmetic number, because the mean of its divisors is an integer number (2006113200).

Almost surely, 2^20621061372 is an apocalyptic number.

It is an amenable number.

20621061372 is an abundant number, since it is smaller than the sum of its proper divisors (27525655428).

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

20621061372 is a wasteful number, since it uses less digits than its factorization.

20621061372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1103825 (or 1103823 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

Adding to 20621061372 its reverse (27316012602), we get a palindrome (47937073974).

The spelling of 20621061372 in words is "twenty billion, six hundred twenty-one million, sixty-one thousand, three hundred seventy-two".