20621001942 has 12 divisors (see below), whose sum is σ = 44678837580. Its totient is φ = 6873667308.

The previous prime is 20621001893. The next prime is 20621001971. The reversal of 20621001942 is 24910012602.

20621001942 is a `hidden beast` number, since 20 + 621 + 0 + 0 + 19 + 4 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 572805592 + ... + 572805627.

It is an arithmetic number, because the mean of its divisors is an integer number (3723236465).

Almost surely, 2^20621001942 is an apocalyptic number.

20621001942 is an abundant number, since it is smaller than the sum of its proper divisors (24057835638).

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

20621001942 is a wasteful number, since it uses less digits than its factorization.

20621001942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1145611227 (or 1145611224 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

It can be divided in two parts, 2062 and 1001942, that added together give a square (1004004 = 1002²).

The spelling of 20621001942 in words is "twenty billion, six hundred twenty-one million, one thousand, nine hundred forty-two".