20429636502 has 16 divisors (see below), whose sum is σ = 44573752512. Its totient is φ = 6190798920.

The previous prime is 20429636501. The next prime is 20429636519. The reversal of 20429636502 is 20563692402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20429636501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154769908 + ... + 154770039.

It is an arithmetic number, because the mean of its divisors is an integer number (2785859532).

Almost surely, 2^20429636502 is an apocalyptic number.

20429636502 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20429636502 is an abundant number, since it is smaller than the sum of its proper divisors (24144116010).

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

20429636502 is a wasteful number, since it uses less digits than its factorization.

20429636502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309539963.

The product of its (nonzero) digits is 155520, while the sum is 39.

The spelling of 20429636502 in words is "twenty billion, four hundred twenty-nine million, six hundred thirty-six thousand, five hundred two".