19903029902 has 32 divisors (see below), whose sum is σ = 34476378624. Its totient is φ = 8440740000.

The previous prime is 19903029889. The next prime is 19903029907. The reversal of 19903029902 is 20992030991.

It is a super-2 number, since 2×19903029902² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19903029907) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4017527 + ... + 4022477.

It is an arithmetic number, because the mean of its divisors is an integer number (1077386832).

Almost surely, 2^19903029902 is an apocalyptic number.

19903029902 is a deficient number, since it is larger than the sum of its proper divisors (14573348722).

19903029902 is a wasteful number, since it uses less digits than its factorization.

19903029902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7904.

The product of its (nonzero) digits is 78732, while the sum is 44.

The spelling of 19903029902 in words is "nineteen billion, nine hundred three million, twenty-nine thousand, nine hundred two".