20705345502 has 32 divisors (see below), whose sum is σ = 42801357312. Its totient is φ = 6673543104.

The previous prime is 20705345491. The next prime is 20705345503. The reversal of 20705345502 is 20554350702.

It is a super-2 number, since 2×20705345502² (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 (20705345503) 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, 418903 + ... + 465714.

It is an arithmetic number, because the mean of its divisors is an integer number (1337542416).

Almost surely, 2^20705345502 is an apocalyptic number.

20705345502 is an abundant number, since it is smaller than the sum of its proper divisors (22096011810).

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

20705345502 is a wasteful number, since it uses less digits than its factorization.

20705345502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884752.

The product of its (nonzero) digits is 42000, while the sum is 33.

The spelling of 20705345502 in words is "twenty billion, seven hundred five million, three hundred forty-five thousand, five hundred two".