19902070 has 16 divisors (see below), whose sum is σ = 37931328. Its totient is φ = 7492480.

The previous prime is 19902067. The next prime is 19902073. The reversal of 19902070 is 7020991.

It is an interprime number because it is at equal distance from previous prime (19902067) and next prime (19902073).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19902073) 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, 58366 + ... + 58705.

It is an arithmetic number, because the mean of its divisors is an integer number (2370708).

Almost surely, 2^19902070 is an apocalyptic number.

19902070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19902070 is a deficient number, since it is larger than the sum of its proper divisors (18029258).

19902070 is a wasteful number, since it uses less digits than its factorization.

19902070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117095.

The product of its (nonzero) digits is 1134, while the sum is 28.

The square root of 19902070 is about 4461.1736124029. The cubic root of 19902070 is about 270.9979983785.

The spelling of 19902070 in words is "nineteen million, nine hundred two thousand, seventy".