102020155670 has 32 divisors (see below), whose sum is σ = 188785575936. Its totient is φ = 39675276000.

The previous prime is 102020155649. The next prime is 102020155673. The reversal of 102020155670 is 76551020201.

It is a super-2 number, since 2×102020155670² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102020155673) 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, 647786 + ... + 789725.

It is an arithmetic number, because the mean of its divisors is an integer number (5899549248).

Almost surely, 2^102020155670 is an apocalyptic number.

102020155670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

102020155670 is a deficient number, since it is larger than the sum of its proper divisors (86765420266).

102020155670 is a wasteful number, since it uses less digits than its factorization.

102020155670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1437716.

The product of its (nonzero) digits is 4200, while the sum is 29.

Adding to 102020155670 its reverse (76551020201), we get a palindrome (178571175871).

The spelling of 102020155670 in words is "one hundred two billion, twenty million, one hundred fifty-five thousand, six hundred seventy".