20102070 has 32 divisors (see below), whose sum is σ = 49370112. Its totient is φ = 5235552.

The previous prime is 20102029. The next prime is 20102087. The reversal of 20102070 is 7020102.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6502 + ... + 9081.

It is an arithmetic number, because the mean of its divisors is an integer number (1542816).

Almost surely, 2^20102070 is an apocalyptic number.

20102070 is an abundant number, since it is smaller than the sum of its proper divisors (29268042).

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

20102070 is a wasteful number, since it uses less digits than its factorization.

20102070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15636.

The product of its (nonzero) digits is 28, while the sum is 12.

The square root of 20102070 is about 4483.5332049624. The cubic root of 20102070 is about 271.9027460123.

Adding to 20102070 its reverse (7020102), we get a palindrome (27122172).

The spelling of 20102070 in words is "twenty million, one hundred two thousand, seventy".