19701955 has 64 divisors (see below), whose sum is σ = 31933440. Its totient is φ = 11321856.

The previous prime is 19701947. The next prime is 19702009. The reversal of 19701955 is 55910791.

It is a happy number.

It is not a de Polignac number, because 19701955 - 2³ = 19701947 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 371709 + ... + 371761.

It is an arithmetic number, because the mean of its divisors is an integer number (498960).

Almost surely, 2^19701955 is an apocalyptic number.

19701955 is a deficient number, since it is larger than the sum of its proper divisors (12231485).

19701955 is a wasteful number, since it uses less digits than its factorization.

19701955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140.

The product of its (nonzero) digits is 14175, while the sum is 37.

The square root of 19701955 is about 4438.6884324088. The cubic root of 19701955 is about 270.0866434322.

The spelling of 19701955 in words is "nineteen million, seven hundred one thousand, nine hundred fifty-five".