3420021662520 has 32 divisors (see below), whose sum is σ = 10260064987920. Its totient is φ = 912005776640.

The previous prime is 3420021662513. The next prime is 3420021662537. The reversal of 3420021662520 is 252661200243.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14250090141 + ... + 14250090380.

Almost surely, 2^{3420021662520} is an apocalyptic number.

3420021662520 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3420021662520 is an abundant number, since it is smaller than the sum of its proper divisors (6840043325400).

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

3420021662520 is a wasteful number, since it uses less digits than its factorization.

3420021662520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28500180535 (or 28500180531 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

Adding to 3420021662520 its reverse (252661200243), we get a palindrome (3672682862763).

The spelling of 3420021662520 in words is "three trillion, four hundred twenty billion, twenty-one million, six hundred sixty-two thousand, five hundred twenty".