20621602502 has 16 divisors (see below), whose sum is σ = 31209770880. Its totient is φ = 10218595008.

The previous prime is 20621602501. The next prime is 20621602517. The reversal of 20621602502 is 20520612602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20621602501) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 104324 + ... + 228312.

It is an arithmetic number, because the mean of its divisors is an integer number (1950610680).

Almost surely, 2^20621602502 is an apocalyptic number.

20621602502 is a deficient number, since it is larger than the sum of its proper divisors (10588168378).

20621602502 is a wasteful number, since it uses less digits than its factorization.

20621602502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124735.

The product of its (nonzero) digits is 2880, while the sum is 26.

The spelling of 20621602502 in words is "twenty billion, six hundred twenty-one million, six hundred two thousand, five hundred two".